A function can have zero to many parameters, and it can have either zero or one return value(s).
A code module known as a function carries out a specific task. Several instances include sorting, looking for a specific item, and inverting a square matrix. A function is thoroughly tested after it is developed. Following that, it is added to the library of functions.
Programmers can define their own functions in C++. The codes defined in the function's body are all executed when the function is called from any other portion of the program. Parameters are the values that are specified at the time when the function prototype or definition of the function is made. A function may have a single return value or a large number of parameters.
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