Recursion - Raise value to power n

recursivePowExample.js

function PowExample(val, exp){
    
    //Safe case to catch all possible errors
    if(val == 0 || typeof val != 'number' 
       || typeof exp != 'number') return 0; 
    
    //First base case. Avoid recursivity when 
    //power is 0.
    if(exp === 0) return 1;
    
    //Second base case. return (exp === 1)? val will be executed
    //when PowExample has been invocated at least once.
    //Recursive Call => val * PowExample(val, exp-1)    
    return (exp === 1)? val : val * PowExample(val, exp-1);
};