Unexpected Result With JavaScript Substr()
javascript, substr
Solution
`.substr(4,6)` method returns 6 characters starting at index `4`. Use `.substring` instead.
var add_date = "20170505",
y = add_date.substring(0, 4);
console.log(y);
var add_date = "20170505",
m = add_date.substring(4, 6);
console.log(m);
Problem
I'm having a problem with substr() in JavaScript. Please look at the code below. The following works as expected. y = 2017 ``` var add_date = "20170505"; var y = add_date.substr(0, 4); alert(y); ``` But... the following doesn't work. It should return '05' but instead it returns 0505. m = 0505 ``` var add_date = "20170505"; var m = add_date.substr(4, 6); alert(m); ``` Could someone explain me what's wrong? Thanks, Nathan