Writing your own functions

Imagine you want to create a sin function which takes angles in degrees, instead of radians. Let's call the function sin_deg(degrees). It will take its parameter degrees, convert the value to radians and return the sin result, which was calculated with the sin function from the math library. You can define a function with the keyword def. The function body is again indented, like we saw in case of the conditions or the loops:

from math import sin,radians
def sin_deg(degrees):
   rad = radians(degrees)
   return sin(rad)

We can call this function as follows:

angle = 30              # use 30 degrees as parameter value
result = sin_deg(angle) # calculates the sin of "angle" degrees using our own sin_deg function
print("sin(",angle,") = ",result)

Let's try these ExerciseSheets#SecondSession
Thereafter we will learn how to access hardware in Hardware Access GPIO