C++ How can i remove the last comma?

October 8, 2022

    #include <iostream>
    using namespace std;
    

    int main() {
      string x;
      cin >> x;
      char ch;
     
/* how can i remove the last comma? */
      int l = x.length();
      for (int i = 0; i < l; i++) {
        ch = x.at(i);
        cout << ch << ",";}
      return 0;
    }

I expect:
input: 1234
output: 1,2,3,4

but now:
input: 1234
output: 1,2,3,4,

>Solution :

Do this(Basically you print the comma separately between that you check if it is the last iteration and works for any numbers):

#include <iostream>
using namespace std;

int main() {
  string x;
  cin >> x;
  char ch;
 
/* how can i remove the last comma? */
  int l = x.length();
  for (int i = 0; i < l; i++) {
    ch = x.at(i);
    
    cout << ch ;
    if (i==l-1) {break;}
    cout << ",";}
  return 0;
}