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JavaScript The Solution

Carlton Nunes Desouza
Carlton Nunes Desouza
12,965 Points

My solution with comments

  Simple script to display some
  math on the html page with numbers
  from user input.

alert("Let's do some math!");

// store prompt input as number type using +
const num1 = +prompt("Enter first number");
const num2 = +prompt("Enter second number");

// checks that variables are valid numbers, and num2 is not 0
if ( isNaN(num1) || isNaN(num2) || num2 === 0 ) {

  // if not valid, alert user and do not continue block
  alert("Invalid input, please reload and try again.");

// if valid continue to else statement
} else {

  // create message using multiline template literals
  const message = `
    <h1>Math with the numbers ${num1} and ${num2}</h1>
    ${num1} + ${num2} = ${num1 + num2}
    ${num1} * ${num2} = ${num1 * num2}
    ${num1} / ${num2} = ${num1 / num2}
    ${num1} - ${num2} = ${num1 - num2}

  // write message to document