Python | frexp() Function
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.
Code #1:
# Python3 code demonstrate frexp() function # importing math libraryimport math # calculating mantissa and# exponent of given integerprint(math.frexp(3))print(math.frexp(15.7))print(math.frexp(-15)) |
Output:
(0.75, 2) (0.98125, 4) (-0.9375, 4)
Code #2:
# Python3 code demonstrate frexp() function # importing math libraryimport math # creating a listlst = [15, 13.76, 17.5, 21] # creating a tupletpl = (-15.85, -41.24, -11.2, 54) # calculating mantissa and exponent# of 1st, 3rd elements in list print(math.frexp(lst[0]))print(math.frexp(lst[2])) # calculating mantissa and exponent# of 2nd, 3rd and 4th elements in tuple print(math.frexp(tpl[1]))print(math.frexp(tpl[2]))print(math.frexp(tpl[3])) |
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 code demonstrates when error occursimport math print(math.frexp('25')) |
Output:
TypeError: a float is required
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