Python program to convert degree to radian

Objective

Write a Python program to convert degrees to radians.

What is a Radian?

A radian is the measure of the central angle of a circle, whose arc length is the same as the radius of the circle.

1 radian is equal to 57.3 degrees.

Method 1

Code

pi = 22/7
degrees = 5

radians = degrees * pi / 180
print(radians)

Output

0.0873015873015873

Method 2 - Asking user input

Code

pi = 22/7
degrees = float(input("Input degrees ==> "))

radians = degrees * pi / 180
print(radians)

Output

Input degrees ==> 23
0.40158730158730155

Method 3 - Using the math module

You can also use the degrees and radians functions from the math module.

1. Use degrees function to convert radians to degrees.
2. Use radians function to convert degrees to radians.

Converting degrees to radians

Code/Output

import math

#0 radians == 0 degrees
math.degrees(0)
>>> 0.0

#pi/2 radians is 90 degrees
math.degrees(math.pi/2)
>>> 90.0

#pi radians is 180 degrees
math.degrees(math.pi)
>>> 180.0      

#pi+pi/2 radians is 270 degrees
math.degrees(math.pi+(math.pi/2))
>>> 270.0 

#2*pi radians is 360 degrees
math.degrees(math.pi+math.pi)
>>> 360.0   

Converting radians to degrees

Code/Output

#  Converting radians to degrees
import math

#0 degrees == 0 radians
math.radians(0)
>>> 0.0

#90 degrees is pi/2 radians
math.radians(90)
>>> 1.5707963267948966

#180 degrees is pi radians
math.radians(180)
>>> 3.141592653589793

#270 degrees is pi+(pi/2) radians
math.radians(270)
>>> 4.71238898038469

#360 degrees is 2*pi radians
math.radians(360)
>>> 6.283185307179586