Functions

Functions can be used to execute same code over and over again. It is a good programming practice to use functions instead of repeating same code again and again. Functions have a single return value.

You can think of a function as obtaining a square root of a number. The number is going to be an input to square root function, the result of square root will be assigned to a variable in a computer or it will be used for additional calculations.

Functions have a single return value.

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