fmod() function is one of the Standard math library function in Python, which is used to calculate the Module of the specified given arguments.

Syntax: math.fmod( x, y ) Parameters: x any valid number (positive or negative). y any valid number(positive or negative). Returns: Return a floating point number value after calculating module of given parameters x and y.

Time Complexity: O(1)

Auxiliary Space: O(1)

Example #1: 

# Python3 program to demonstrate fmod() function

import math

# Tuple Declaration
Tup = (15, 22, -2, -40 )

# List Declaration
Lis = [-89, 38, -39, 16]

# modulus of +ve integer number
print(math.fmod(4, 5))
print(math.fmod(43.50, 4.5))

# modulus of -ve integer number
print(math.fmod(-17, 5))
print('%.2f' %math.fmod(-10, 4.78))

# modulus of tuple item
print("\nModulus of tuple items:")
print(math.fmod(Tup[2], 5))
print(math.fmod(Tup[2], -6))

# modulus of list item
print("\nModulus of list items:")
print(math.fmod(Lis[3], 4))
print(math.fmod(Lis[0], -15))

Output:

4.0
3.0
-2.0
-0.44

Modulus of tuple items:
-2.0
-2.0

Modulus of list items:
0.0
-14.0

  Example #2: ValueError and TypeError

• If both the x and y arguments are Zero, fmod() function will return the output as ValueError.
• If y argument (second argument) is Zero, fmod() function will return the output as ValueError.
• If the x value or y value is not a number, fmod() function will return TypeError.

# Python3 program to demonstrate
# errors in fmod() function

import math

# will give ValueError
print(math.fmod(0, 0))
print(math.fmod(2, 0))

# it will give TypeError
print(math.fmod('2', 3))

Output:

ValueError: math domain error
ValueError: math domain error
TypeError: a float is required