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Python - math.exp() method example

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Created by:

Keisha-Acosta

380

math.exp() is a method that takes only one parameter and returns exponential function value in the range 0 (exclusive) to infinity.

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import math
​
print(math.exp(-100))       # 3.720075976020836E-44
print(math.exp(-1))         # 0.36787944117144233
print(math.exp(0))          # 1
print(math.exp(1))          # 2.718281828459045
print(math.exp(100))        # 2.6881171418161356E43
​
print(math.exp(-math.inf))  # 0
print(math.exp(math.inf))   # ∞ / +Infinity
print(math.exp(math.nan))   # NaN

1. Documentation

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Syntax	xxxxxxxxxx 1 math.exp(number)
Parameters	`number` - value that specifies the exponent
Result	Exponential function value of a number in the range `0` (exclusive) to `infinity`. If the value can not be calculated `nan` is returned.
Description	`math.exp()` is a method that takes only one parameter and returns exponential function value.

2. Reversed console plot example

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import math
​
​
def print_line(y1, y2, dy, character):
    line = ""
​
    y = y1
    while y < y2:
        line += " "
        y += dy
​
    print(line, character)
​
​
x1 = -4
x2 = 2.8
​
y1 = -1.0
y2 = +10.0
​
xSteps = 25
ySteps = 60
​
dx = (x2 - x1) / xSteps  # x axis step
dy = (y2 - y1) / ySteps  # y axis step
​
rad = x1
while rad < x2:
    y = math.exp(rad)
​
    if y <= y1 or y >= y2:
        print(" ")
    else:
        print_line(y1, y, dy, "+")
​
    rad += dx

Output: