JSFiddle - React, Tailwind, and code Playground

JavaScript

//find all prime numbers
function showMePrimeNumbers(start, end){
    var primes = [];
    for(var number = start; number < end; number++){
        var primeNumberDividers = []; //there should only be 2: 1 & number
        for(var divider = 1; divider <= number; divider++){
            if(number % divider === 0){
                primeNumberDividers.push(divider);
            }      
        }
        if(primeNumberDividers.length === 2){
            primes.push(number);
        }
    }
    return primes;
}
           
console.log(showMePrimeNumbers(1, 100));