Declare a prototype for a function called isPrime that returns true or false and expects a single parameter named number of type int.

A prototype for a function called isPrime that returns is true.

Explanation:

Function prototype is just a skeletal part of the function which has a return type, function name and the respective parameters.

There is a difference between function and function prototype.

Function is nothing but a function definition, where it actually has all the lines of codes which need to be processed when it is called. It can be invoked any number of times and anywhere within the scope of the function.

As per the given question, the prototype can be,

bool isPrime (int);