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
// =============> The error will be a syntax error. A number is not a valid variable name - variable names cannot start with a number.

function square(3) {
    return num * num;
}

// =============> write the error message here: SyntaxError: Unexpected number. The error is because the variable name cannot start with a number.

// =============> explain this error message here: You cannot begin a variable name with a number

// Finally, correct the code to fix the problem

// =============> write your new code here:
// function square(num) {
//   return num * num;
// }