exp() math function to get value of e raised to the power x the input number in Python

exp() returns e raised to the power x ( input number ) .
Here are some examples with different type of numbers.

import math
print(math.exp(5))    # 148.4131591025766
print(math.exp(0))    # 1.0

Using negative number

import math
print(math.exp(-34.11))   # 1.5353776777478691e-15
print(math.exp(-34.99))   # 6.368484237071642e-16
print(math.exp(-34))      # 1.713908431542013e-15

Using formula and e

The math formula for exp() function is e ** x

import math
print(math.e ** -34.11) # 1.5353776777478719e-15

e : is a numerical constant of value equal to 2.71828
This is the base of natural logarithm and known as Euler's number.

Example: Combining exp() with log()

import math
x = 5
print(math.exp(math.log(x)))  # Output: 5.0

Output:

5.0

Example: Exponential Decay

import math
initial_value = 100
decay_rate = 0.05
time = 10
decayed_value = initial_value * math.exp(-decay_rate * time)
print(decayed_value)  # Output: 60.653065971263345

Output:

60.653065971263345

floor() & ceil() modf() expm1()

Math Functions copysign() Python- Tutorials

Subhendu Mohapatra

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