JSFiddle - React, Tailwind, and code Playground

JavaScript

function arrayT(min,max) {

var y =[];

if (min<max) {
var x = min;
y.unshift(x);
while (x<max)
{x++;
y.push(x)}

var m = y.reduce(function(n1,n2){
return n1+n2;
})
console.log(m);
}
else if (min>max) {
var x = max;
y.unshift(x);
while (x<min)
{x++;
y.push(x)}
var m = y.reduce(function(n1,n2){
return n1+n2;
})
console.log(m)

}
}
arrayT(10,5);