2.js

// Predict and explain first BEFORE you run any code...

// this function should square any number but instead we're going to get an error

// =============> write your prediction of the error here My prediction: There is an error with parameter.
/*
function square(3) {
    return num * num;
}
console.log(square)
*/
// =============> write the error message here: SyntaxError: Unexpected number 

// =============> explain this error message here: An error because of invalid parameter.

// Finally, correct the code to fix the problem

// =============> write your new code here
function square(num) {
    return num * num;
}
console.log(square(3))