frexp() function in python math module

Overview:

Given a floating point number, the function frexp() returns the mantissa and the exponent whose base is 2.
Multiplying the mantissa with two raised to the power of exponent gives back the original number passed as the argument (num = m*2^e).

Example:

# Example Python program that gets the mantisa and exponent
# of a floating point number using the function math.frexp()
# The base of the exponent is 2.
import math

# Get the tuple of mantissa and exponent
me = math.frexp(6.667)
print("Mantissa:%f"%me[0])
print("Exponent:%d"%me[1])

# Using the mantissa, exponent and the base of 2
# get the input number back
num = me[0]*math.pow(2, me[1])
print("Input number:")
print(num)

Output:

Mantissa:0.833375

Exponent:3

Input number:

6.667

Frexp() function in python math module

Overview:

Example:

Output: