Defining Functions

You can define your own functions if some parts of code need to be repeated during a program's execution.

To define a function, use the def keyword followed by function name. Then, within the parentheses set function parameters. Next, put a colon sign, and define instructions that function should do (these lines must be indentated). If you want your function to return something, use the return keyword. The instructions within the function are called function body. For example,


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# Defining simple function with two parameters
def discount(price, discount_percent):
&nbsp;&nbsp;&nbsp;&nbsp;print("Initial price:", price)
&nbsp;&nbsp;&nbsp;&nbsp;print("Discount:", discount_percent, "%")
&nbsp;&nbsp;&nbsp;&nbsp;new_price = price * (1-discount_percent/100)
&nbsp;&nbsp;&nbsp;&nbsp;print("New price:", new_price)

# Calling function
discount(100, 15)
discount(270, 25)

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