c# - int to char array -

static void main(string[] args) {     int num = 382;     int output = 0;     char[] nlst = num.tostring().tochararray();     (int = 0; < nlst.length; i++)     {         output += nlst[i];     }     console.writeline(output);     console.readline(); } 

the output result 157, should 13.with dedbugging found 3 elements of char[] nlst :

[0]51'3', [1]56'8', [2]50'2'

why? what's meaning of 51,56,50?

you're assuming char value of '0' 0. not; in fact utf16 value of '0' 48.

so adding utf16 values of characters '3', '8' , '2', i.e. 51, 56 , 50.

note if aim add digits of integer, best approach avoid converting string completely, so:

int num = 382;  // compute sum of digits of num  int total = 0;  while (num > 0) {     total += num%10;     num /= 10; }  console.writeline(total); 

however if want know how version working, subtract '0' each character before adding codes together. convert '0' 0, '1' 1, etc:

for (int = 0; < nlst.length; i++) {     output += nlst[i] - '0'; // subtract '0' here. }