Pure functions return the same output for the same inputs and do not produce side effects. They do not modify state outside their scope, such as modifying global variables, changing the state of objects passed as arguments, or performing I/O operations.

Syntax:
function functionName(paramerter1,paramerter1, .. ){
    //other logic
    
    return value;
}

Example:
function pureAdd(a, b) {
    return a + b;
}

console.log(pureAdd(2, 3));