typof example

typeofExample.js

let myNumber = 10;
let myString = 'this is a string';

if (typeof myNumber === 'string') {
  console.log('This is a string, not a number.')
} else {
  console.log('This is a number');
}

const badMath = (x, y) => {
  return x * y;
}

badMath(myNumber, myString) //  Output is NaN because myString isn't a number.