Python math.frexp() – Find Mantissa and Exponent (m, e)

Python math.frexp()

math.frexp(x) function returns the mantissa and exponent of x as the pair (m, e).

x == m * 2^e

Syntax

The syntax to call frexp() function is

math.frexp(x)

where

Examples

1. Find mantissa and exponent of float value

In the following program, we find the (mantissa, exponent) for x=5.5.

import math

x = 5.5
result = math.frexp(x)
print('(mantissa, exponent) :', result)

Output

(mantissa, exponent) : (0.6875, 3)

2. Find mantissa and exponent of zero

In the following program, we find the (mantissa, exponent) for a value of zero.

import math

x = 0
result = math.frexp(x)
print('(mantissa, exponent) :', result)

Output

(mantissa, exponent) : (0.0, 0)

3. Find mantissa and exponent of infinity

In the following program, we take a value of infinity in variable x, and find its mantissa, and exponent.

import math

x = math.inf
result = math.frexp(x)
print('(mantissa, exponent) :', result)

Output

(mantissa, exponent) : (inf, 0)

4. Find mantissa and exponent of nan

(mantissa, exponent) for x=NaN (Not a Number).

import math

x = math.nan
result = math.frexp(x)
print('(mantissa, exponent) :', result)

Output

(mantissa, exponent) : (nan, 0)

Summary

In this Python Math tutorial, we learned the syntax of, and examples for math.frexp() function.