Python | frexp() Function
Last Updated :
14 Feb, 2023
frexp() function is one of the Standard math Library function in Python. It returns mantissa and exponent as a pair (m, e) of a given value x, where mantissa m is a floating point number and e exponent is an integer value. m is a float and e is an integer such that x == m * 2**e exactly. If x is zero, returns (0.0, 0), otherwise 0.5 <= abs(m) < 1. This is used to “pick apart” the internal representation of a float in a portable way.
Syntax: math.frexp( x ) Parameters: Any valid number (positive or negative). Returns: Returns mantissa and exponent as a pair (m, e) value of a given number x. Exception: If x is not a number, function will return TypeError.
Time Complexity: O(1)
Auxiliary Space: O(1)
Code #1:
Python3
import math
print (math.frexp( 3 ))
print (math.frexp( 15.7 ))
print (math.frexp( - 15 ))
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Output:
(0.75, 2)
(0.98125, 4)
(-0.9375, 4)
Code #2:
Python3
import math
lst = [ 15 , 13.76 , 17.5 , 21 ]
tpl = ( - 15.85 , - 41.24 , - 11.2 , 54 )
print (math.frexp(lst[ 0 ]))
print (math.frexp(lst[ 2 ]))
print (math.frexp(tpl[ 1 ]))
print (math.frexp(tpl[ 2 ]))
print (math.frexp(tpl[ 3 ]))
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Output:
(0.9375, 4)
(0.546875, 5)
(-0.644375, 6)
(-0.7, 4)
(0.84375, 6)
Code #3: If the x parameter is not a number, frexp() function will return a TypeError.
Python3
import math
print (math.frexp( '25' ))
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Output:
TypeError: a float is required
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