Functions-Constant and Variable as Parameters in Swift

Function parameters are constants by default. Trying to change the value of a function parameter from within the body of that function results in a compile-time error. This means that you can’t change the value of a parameter by mistake. For example:

Here s1 s2 and joiner are Constants by default. by constants I mean; they will only take …

Function Parameter Names in Swift

The general Syntax of the function is as follows.

However, these parameter names are only used within the body of the function itself, and cannot be used when calling the function. These kinds of parameter names are known as local parameter names, because they are only available for use within the function’s body. External Parameter Names If you want …

Functions in Swift

The following is the syntax to declare a function.

Functions are self-contained chunks of code that perform a specific task. You give a function a name that identifies what it does, and this name is used to “call” the function to perform its task when needed. Functions can also be written within other functions to encapsulate useful functionality within a …