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
// There is no "num" veriabal defined. num should be in the beackets


// =============> write your prediction of the error here

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

// // =============> write the error message here
// /home/martinmclean158/Module-Structuring-and-Testing-Data/Sprint-2/1-key-errors/0.js:8
//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
//       ^

// SyntaxError: Identifier 'str' has already been declared

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

// Finally, correct the code to fix the problem

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

function square(num) {
    return num * num;
}
console.log(square(3)); // should print 9