JSFiddle - React, Tailwind, and code Playground

by Jessie Lau

JavaScript

function ArithGeo(arr) { 
    for(var i = 1; i < arr.length; i++){
        var differenceNum = arr[i] - arr[i-1];
        if(arr[i] + differenceNum !== arr[i+1]){
            return "-1";
        }
    }
    return "arith";         
}
console.log(ArithGeo([2, 4, 6, 8]));
//console.log(ArithGeo([3, 6, 9, 10]));
//console.log(ArithGeo([2, 4, 8, 16,32]));
//console.log(ArithGeo([2, 5, 6, 10,32]));