javascript - Highcharts label formatter return inside and outside if statement? Is this correct? -

using highcharts label formatter

http://api.highcharts.com/highcharts#yaxis.labels.formatter

i'm using code below customize first label, , return values others. how should use return twice within formatter? while works i'm checking there isn't better way write function. i'm little new js , wondering if returned data combined how?

thanks

jsfiddle here

$(function () {     $('#container').highcharts({         chart: {             marginbottom: 80         },         xaxis: {             categories: ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec']         },          yaxis: {             labels: {                 //align: 'left',                 //x: 0,                 //y: -2,                 usehtml: true,                 formatter:function(){                     if(this.isfirst){                         return 'test';                     }                     return this.value;                 }             }         },          series: [{             data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]         }]     }); });