How To Use Floor
i dont know how to use floor,in my programme:
int k int z float x int y=13 void setup void loop{x=/4 if )k=1 elsek=2 if digitalWrite else digitalWrite but when i use it on isis proteus i dont find the right result then k=2, but i found led pin 13 on)help me please
Please edit your post, select the code, and put it between [
You can do that by hitting the Code icon above the posting area. It is the first icon, with the symbol: < />
The intermediate values aren’t floats, so the part after the decimal is being dropped.
x=/4
will produce different behavior . As it is, it’s not turned into a float until the math is done – as integers.
in my programm, i want to know if the result of a function is an integer or no!the result found every time is x intiger when x=/4=1.5 this is a float.
That code does not compile.
Please use code tags when posting code.
int k,yfloat x void setup void loop{ x=/4 if ) k=1 //k=1 so x in an integer else k=2 //k=2 so x is a float
i dont know what to do, its working in my computer, but it dosnt give a right result
The code you posted above is not working on any computer, because it is incomplete and does not compile
Please, just cut the code from the IDE and post it here in code tags.
int k,y=13 float x void setup void loop
Python Floor Function Example
The floor Function in Python is used to return the closest integer value which is less than or equal to given numeric value. Let me show you a simple example of floor function that returns the closet value of 12.95
# Python floor function exampleimport mathval = math.floorprint
12
In this Python floor example, we are finding the closest value of both positive and negative values.
import mathprint = ', math.floor)print = ', math.floor)printprint = ', math.floor)print = ', math.floor)
Python Mathfloor Function Example
The following query will show you the multiple ways to use this python floor function.
import math # This allows us to use the floor functiona = 0.24b = -90.98c = 45.05d = 45.98e = math.floorpi = math.floorx = # List Exampley = # Tuple Exampleprint)print))print))print))printprintprint# printing List values print)print)print)print# printing Tuple values print)print)print)
The Value of 'a' after the floor function is: 0 The Value of -90.98 after the floor function is: -91 The Value of 45.05 after the floor function is: 45 The Value of 45.98 after the floor function is: 45 The Value of 'e' after the floor function is: -5 The Value of 'PI' after the floor function is: 3 First Value from List is: -23 Second Value from List is: 2 Third Value from List is: 9 First Value from List is: -3 Second Value from List is: 22 Third Value from List is: 22
First, We imported the math library using the following statement. This will allow us to use the mathematical functions like floor
import math
Below lines of Python code is used to declare variables and assigning the value.
a = 0.24b = -90.98c = 45.05d = 45.98
In the next line, we applied math floor function in python directly on the multiple values
e = math.floor
floor
floor = â 5
In the next line, we declared the Python List and Python Tuple. Next, we used the Python floor function inside the print statements to find the closest integer value of the above mentioned variable
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Python Mathfloor Function Example And Explanation 3
In the following code snippet of this example, convert_list_new function takes an argument of type list. It checks and converts all individual items of the list using math.floor function. It appends all successfully converted items in a new list object using math.floor function. If an item can not be converted it simply appends None as a placeholder of an item to maintain the exact index of the original list. convert_list_new doesnt modify the original list object instead it creates a new object as you can verify it from the ID of both objects.
In the function convert_list_modify of this example, we check, convert and replace it with an item in the original list object. In this way, original object is modified. This is a natural behavior of mutable objects in Python. You can read more about mutable and immutable function parameter in this article.
You can check the IDs of the list object before and after calling convert_list_modify function. The IDs are same but after calling convert_list_modify function, IDs of the object are not same.
Using convert_list_new function
Check original lst object is modified: List after conversion – lst_modify:
ID of lst and lst_modify objects: 30673816 30673816 check IDs of lst and lst_modify objects are same
Java Mathceil And Mathfloor Method With Example
The Math.ceil and Math.floor in Java methods are used to return the smallest and largest integer that are greater than or equal to the argument. Below is the Math floor and ceiling Java example.
public class Guru99 }
We will get the below output of the math.ceil in Java example.
Output:
Ceiling of '84.6' = 85.0Floor of '84.6' = 84.0Ceiling of '0.45' = 1.0Floor of '0.45' = 0.0
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Mathfloor Rounds Down It Operates On Types Such As Decimal Or Double
It reduces the value to the nearest integer. The Floor method is straightforward, but useful, when it is called for in programming.
Example. First, the Floor method is found in the base class library and is available in the Math type. It implements the mathematical floor function, which finds the largest integer “not greater” than the original number.
Next: This example shows the Floor method being used on doubles that would be rounded down or rounded up with the Math.Round method.
C# program that uses Math.Floorusing System class Program}Output123.456123 123.987123
In the example, the two numbers 123.456 and 123.987 are rounded down to the nearest integer. This means that regardless of how close they are close to 124, they are rounded to 123.
Note: Floor can be useful when rounding numbers that are part of a larger representation of another number.
Discussion. The Math.Floor method when given a positive number will erase the digits after the decimal place. But when it receives a negative number, it will erase the digits and increase the number’s negativity by 1.
So: Using Math.Floor on a negative number will still decrease the total number. This means it will always become smaller.
Next, the Math.Floor method can be used on the 128-bit decimal type. When you call Math.Floor with this data type, the decimal.Floor static method is immediately called into. It is sometimes clearer to directly use decimal.Floor.
Floor And Ceiling Functions
In mathematics and computer science, the floor function is the function that takes as input a real numberx, and gives as output the greatest integer less than or equal to x, denoted floor or x. Similarly, the ceiling function maps x to the least integer greater than or equal to x, denoted ceil or x.
For example, 2.4 = 2, 2.4 = 3, 2.4 = 3, and 2.4 = 2.
The integral part or integer part of x, often denoted is usually defined as the x if x is nonnegative, and x otherwise. For example, = 2 and = 2. The operation of truncation generalizes this to a specified number of digits: truncation to zero significant digits is the same as the integer part.
Some authors define the integer part as the floor regardless of the sign of x, using a variety of notations for this.
For n an integer, n = n = = n.
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Python Mathfloor Function Example And Explanation 2
Following code snippet takes an input from the user and checks if entered number can be converted into a float number. Then it calculates the floor value of the given number using the Python math.floor function. It prints a message if the user has entered an invalid number such as string or spaces using Python built-in exception handling.
import mathstr_num = input: ')try: num = floatexcept Exception: print num = 0print)
Enter a valid number : 55Output value is 55
Example: How Do We Define The Floor Of 231
Well, it has to be an integer …
… and it has to be less than 2.31, right?
- 2 is less than 2.31 …
- but 1 is also less than 2.31,
- and so is 0, and -1, -2, -3, etc.
Oh no! There are lots of integers less than 2.31.
So which one do we choose?
Choose the greatest one
So we get:
The greatest integer that is less than 2.31 is 2
Which leads to our definition:
Floor Function: the greatest integer that is less than or equal to x
Likewise for Ceiling:
Ceiling Function: the least integer that is greater than or equal to x
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Java Math Abs Round Ceil Floor Min Methods/function With Example
Java has had several advanced usage application including working with complex calculations in physics, architecture/designing of structures, working with Maps and corresponding latitudes/longitudes, etc.
In this Java tutorial, you will learn:
All such applications require using complex calculations/equations that are tedious to perform manually. Programmatically, such calculations would involve usage of logarithms, trigonometry, exponential equations, etc.
Now, you cannot have all the log or trigonometry tables hard-coded somewhere in your application or data. The data would be enormous and complex to maintain.
Java provides a very useful class for this purpose. It is the Math java class .
This class provides methods for performing the operations like exponential, logarithm, roots and trigonometric equations too.
Let us have a look at the methods provided by the Java Math class.
The two most fundamental elements in Math are the e and pi . These two constants are often required in the above calculations/operations.
Hence the Math class java provides these two constants as double fields.
Math.E having a value as 2.718281828459045
Math.PI having a value as 3.141592653589793
A) Let us have a look at the table below that shows us the Basic methods and its description
| Method | |
|---|---|
| Returns the largest of the two arguments | Double, float, int, long |
Below is the code implementation of the above methods:
Integer Variable
int i1 = 27 int i2 = -45
Double variables
Generating A Random Integer Between 0 And A Max
Often you need integers. To do this you will have to use some other methods from the Math object, Math.floor and Math.ceil .
For example, if you need to select randomly from an array of 10 elements, you would need a random number between 0 and 9 inclusive .
var x = Math.floor*10) console.log // 7
will never return exactly 1, so Math.random*10 will never return exactly 10. This means that after rounding down, the result will always be 9 or less.)
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How Random Is Mathrandom
It may be pointed out that the number returned by Math.random is a pseudo-random number as no computer can generate a truly random number, that exhibits randomness over all scales and over all sizes of data sets. However, the pseudo-random number generated by Math.random is usually sufficient for the needs of nearly any program you may write. The not-truly-randomness only becomes apparent in astronomically large number sets or when uncommonly precise decimals are needed.
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Java Mathmin Method With Example
The Java Math.min method returns the smallest of the two arguments.
public class Guru99 }
Output:
Minimum out of '27' and '-45' = -45Maximum out of '27' and '-45' = 27Minimum out of '84.6' and '0.45' = 0.45Maximum out of '84.6' and '0.45' = 84.6
B) Let us have a look at the table below that shows us the Exponential and Logarithmic methods and its description-
| Method |
|---|
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Generating A Random Floating Point Number Between 0 And 1
The Math.random method will return a floating point number greater than or equal to 0 and less than 1. In other words 0 < = x < 1. For example:
console.log) // 0.7069207248635578console.log) // 0.765046694794209console.log) // 0.14069121642698246
To get a random number between a larger range multiply the result of Math.random by a number.
Why Do You Add 05 In Mathfloor
Why do people add 0.5 to the value they want to round down, for example math.floor. What does this do?
math.floor returns the largest integer smaller than or equal to the number passed as an argument. Adding 0.5 guarantees that if the number is like 5.5 it will return 6 instead of 5.
-- Documentation: int math.floor math.floor -- return 5math.floor -- return 6
The +.5 helps to round it to the nearest whole number.
For arguments sake, lets say we want to round 9.2 to the nearest integer. We can add 0.5 to it, which will give 9.7. When we use math.floor on it, which will round down, we will get 9. Now, say we want to round 9.9 to the nearest integer, we will add 0.5 to it, which will give 10.4, when we use math.floor on it, itll return 10
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Difference Between Int And Floor In Python
This is one of the frequently asked question because, both the int and floor functions return the same result for positive values. However, if you check with negative values then you can see the difference.
import mathprint Result = ', math.floor)print Result = ', math.floor)print Result = ', int)print Result = ', int)print print result = ', math.floor)print result = ', math.floor)print result = ', int)print result = ', int)
math.floor Result = 100math.floor Result = 200int Result = 100int Result = 200math.floor result = -151math.floor result = -261int result = -150int result = -260
Round Duration Values Toward Negative Infinity
Round each value in a duration array to the nearest number of seconds less than or equal to that value.
t = hours + minutes + seconds t.Format = 'hh:mm:ss.SS'
t = 1x3 duration 08:29:01.23 08:30:01.23 08:31:01.23
Y1 = floor
Y1 = 1x3 duration 08:29:01.00 08:30:01.00 08:31:01.00
Round each value in t to the nearest number of hours less than or equal to that value.
Y2 = floor
Y2 = 1x3 duration 08:00:00.00 08:00:00.00 08:00:00.00
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Getting A Random Integer Between Two Values
This example returns a random integer between the specified values. The value is no lower than min , and is less than max.
functiongetRandomInt
Note: It might be tempting to use Math.round to accomplish that, but doing so would cause your random numbers to follow a non-uniform distribution, which may not be acceptable for your needs.
Python Floor List Example
Let me use this math floor function of Python on List items. Here, we are using the For Loop to iterate list item and then applying floor function for each item.
# Python math floor exampleimport mathnumbers = for num in numbers: print)
-112040-351-451
This math floor in Python example is same as above. However, this time we are using the Map and Lambda function to iterate items.
import mathnumbers = printprintfloor_result = map, numbers)print)
floor function along with map and lambda functions output
The final result of math.floor =
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Mathfloor What Does +1 Actually Do
When you have Math.floor*10)+1 its supposed to pick a random number between 1-10 from what I understand.
However, when I change the +1 to any number higher or lower then 1 I get the same result. Why is this? What does the +1 mean exactly?
- 2If you add something more than +1 and you still end up with numbers between 1-10 something is very wrong.Jun 27 ’12 at 14:10
- What exactly do you mean by “same result”? can you clarify or post some output? Salman AJun 27 ’12 at 14:11
- Dave NewtonJun 27 ’12 at 14:17
- “when I change the +1… I get the same result.” This question is based on a false premise. I think you know what adding 1 does, but you have some other issue in your code. If you have such an issue, please post your actual code. user1106925
What Exactly Does Mathfloor Do
I understand that Math.floor rounds to closest integer, for example
function myFunction
But I fail to understand why
function myFunction
outputs 1
- 3It does not round to the closest integer. It removes any fractional portion of a floating point number effectively it always rounds towards zero. Math.floor is 1. Math.floor is 0, not 1 have you tried it in your browser’s developer console?Mar 19 ’16 at 13:33
- 6Mar 19 ’16 at 13:35
- If you are already downvoting, please be kind to explain why.. stormecMar 19 ’16 at 13:44
- Getting downvotes because none of the statements in question are correct and this is simple math if you read the manual for what Math.floor actually does
No, in fact this line of code outputs 0:
Math.floor
Math.floor always rounds to the nearest whole number that is smaller than your input. You might confuse it with Math.round, that rounds to nearest whole number.
This is why this code always outputs 1 or 0, since input never gets to 2 or bigger:
Math.floor*2)
There’s actually three different rounding functions in JavaScript: Math.floor, its opposite Math.ceil and the “usual” Math.round.
These work like this:
Math.floor // Outputs 0Math.ceil // Outputs 1Math.round // Outputs 0Math.floor // Outputs 0Math.ceil // Outputs 1Math.round // Outputs 1Math.floor // Outputs 0Math.ceil // Outputs 1Math.round // Outputs 1
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