# Introduction Python fmod() Method with Examples The math.fmod() is a library method of math module, it is used to find the modulus or given numbers, where the first parameter is a dividend and the second parameter is divisor. It accepts two arguments and returns modulus in float type.

The math.fmod() is a library method of math module, it is used to find the modulus or given numbers, where the first parameter is a dividend and the second parameter is divisor. It accepts two arguments and returns modulus in float type.

Note: math.fmod() can be used to get the modules/remainder of positive and negative integers, positive and negative floats.

Python fmod()

### Syntax

``````math.fmod(x,y)

``````

### Parameter(s):

• `x`, `y` – numbers (positive or negative, integer or float).

### Return value:

• `float` – it returns a float value, which is a remainder (modulus) of given numbers `x`, `y`.

The fmod() function returns a floating-point number value after calculating the module of the given two numbers.

• If x and y are both zero, then this function returns a ValueError.
• If the second argument means y is zero, then also it returns a ValueError.
• If any of x or y is not a number, then this function returns a TypeError.
Examples of Python fmod() method

### Example 1

``````
# import math library
import math
print(math.fmod(25,5))
print(math.fmod(20,3))
print(math.fmod(-20,12))
print(math.fmod(-13,6))

``````

Output

``````
0.0
2.0
-8.0
-1.0

``````

Note that in output all the numbers whether they are negative or positive are converted into a floating point number after calculating module through fmod() in Python programming language.

### Example 2

Python code to demonstrate example of math.fmod() method

``````
# app.py

# Importing math library
import math
# Demonstrating working of fmod()
# Using different values of x and y

# When both are positive
x = 12
y = 9
print("Module of ", x, " and ", y, "is: ", math.fmod(x, y))

# When any one of them are negative
x = -16
y = 3
print("Module of ", x, " and ", y, "is: ", math.fmod(x, y))

# When both are negative
x = -65
y = -31
print("Module of ", x, " and ", y, "is: ", math.fmod(x, y))

# When second argument (y) is 0
x = 10
y = 0
print("Module of ", x, " and ", y, "is: ", math.fmod(x, y))

``````

Output

``````
Module of  12  and  9 is:  3.0
Module of  -16  and  3 is:  -1.0
Module of  -65  and  -31 is:  -3.0
Traceback (most recent call last):
File "fmod.py", line 24, in <module>
print("Module of ",x," and ",y, "is: ",math.fmod(x,y))
ValueError: math domain error

``````

In the above code, we have declared two variables x and y and given their different values in different cases.

After that, we have a printed module of each case, we can see that the answer is positive only when both x and y are positive, and except that in all cases, the answer is negative.

Also, we can see that in each case, the answer is in floating-point.

However, in the last case, when we gave the value of y is 0, we got a ValueError.

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