12/7/2021 8:16:14 PM

Get a random number in Javascript with a lower and upper bound inclusive.

function get_random_number__start_end_inclusive(start_inclusive, end_inclusive) { console.log("get_random_number__start_end_inclusive: " + start_inclusive + " | " + end_inclusive); //javsacripts built in function //returns a rnd value between 0 and 1 (not including 1) var rnd_initial_value = Math.random(); console.log("rnd_initial_value", rnd_initial_value); //what is the range between the highest and the lowest number desired //ex: 1-5, range = 5, (5 - 1) + 1 var range = (end_inclusive - start_inclusive) + 1; console.log("range", range); //get zero based ranged using the initial rnd value //since the rnd_initial_value will always be under 1, rnd_initial_value * range will always be less than range var zero_based_rnd_number = Math.floor(rnd_initial_value * range); console.log("zero_based_rnd_number", zero_based_rnd_number); //move zero_base_rnd_number based on start_inclusive var final_result = zero_based_rnd_number + start_inclusive; console.log("final_result", final_result); return final_result; }