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

// The function will not execute because of the undefined variable `num` and the parameter `3`,
// which is not allowed to be defined with just numbers. There must be letters to define a variable
// but can begins with numbers.

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

// =============> write the error message here

// SyntaxError: Unexpected number

// =============> explain this error message here

// It's referring to the function parameter `3`

// Finally, correct the code to fix the problem

// =============> write your new code here

function squared(value) {
    return value * value;
}