javascript - Returns the wrong character in SubString method -

i new js, have tried below code,

var str = "\">2\"" var res = str.substring(2,1);

return: >

expected: 2

i have checked below code,

var str = "\">2\"" var res = str.substring(2);

return: "2\"

expected: "2\"

please let me know if misunderstand anything, why returns > instead of 2. in c# works correctly.

thanks in advance

actually doing incorrect in case 1

when

str.substring(2,1);

that means

str.substring(1,2);

from docs

if indexstart greater indexend, effect of substring() if 2 arguments swapped; example, str.substring(1, 0) == str.substring(0, 1).

since char @ 1,2 >, getting same.

however when

str.substring(2);

it equals

 str.substring(2, str.length-1);

if indexend omitted, substring() extracts characters end of string.

TY