script.js

/*

Challenge: 04-range

Difficulty: basic

Prompt:

- Write a function called range that accepts two integers as arguments and returns an array of integers starting with the first argument up to one less than the second argument.
- The range function must be called with the first argument less than or equal to the second argument, otherwise return the string "First argument must be less than second".

Examples:

range(1,4) //=> [1,2,3]
range(-2, 3) //=> [-2,-1,0,1,2]
range(1,1) //=> []
range(5,2) //=> "First argument must be less than second"

*/

// Your solution for 04-range here:

function range(num1, num2) {
    let arr = [];
    if (num1 > num2) {
      return "First argument must be less than second";
    }
    while (num1 < num2) {
      arr.push(num1);
      num1 += 1;
    }
    return arr;
  }