javascript - How to leave comma space off end of array? -

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• how remove last comma? 11 answers

i trying finish program, , ran issue can't quite figure out. want change array of numbers string of ordinal counter parts, have completed program, last value leave of concatenated ', ' (comma space). tried using if statement can't quite work.

function getgetordinal(n) { var s=["th","st","nd","rd"],    v=n%100; return n+(s[(v-20)%10]||s[v]||s[0]); }  var nums = [1, 2, 3, 4] var n = ""; ( var = 0; <= getgetordinal(4).length; i++ ) {         if ( n < getgetordinal(n) ) {             n += getgetordinal(nums[i]) + ', ';                 console.log(n);     }   } // ['1st, 2nd, 3rd, 4th'] < ~ expected result  

here 2 options:

one way add check inside for loop prepend comma if not first iteration of loop:

for (var i=0; <= getgetordinal(4).length; i++) {     if (n < getgetordinal(n)) {         if (i > 0) {             n += ', ';         }         n += getgetordinal(nums[i]);     }   } console.log(n); 

another option leave code is, substring off trailing comma:

for (var i=0; <= getgetordinal(4).length; i++) {     if (n < getgetordinal(n)) {         n += getgetordinal(nums[i]) + ', ';     } }  //n = n.substring(0, n.length - 2); n = n.slice(0, -2); console.log(n);