```
#include<stdio.h>
#include<unistd.h>
void ft_putchar(char x, char y, char z){
write(1, &x, 1);
write(1, &y, 1);
write(1, &z, 1);
}
void ft_print_comb()
{
char i, j, k;
i = '0';
while (i <= '7') {
j = i + 1;
while (j <= '8') {
k = j + 1;
while (k <= '9') {
if(i =='7' && j=='8') */ i created this section to remove comma*/
{
ft_putchar('7', '8', '9');
write(1, '1 ', 1);
}
else
ft_putchar(i, j, k);
write(1, ", ", 2);
k++;
}
j++;
}
i++;
}
}
int main(){
ft_print_comb();
return 0;
}
```

i wrote a code for creating a function that displays all different combinations of three different digits in ascending order, listed by ascending order but i don’t know how to remove the last comma from the output? end of my output looks like this

579, 589, 678, 679, 689, 789,

### >Solution :

The simplest way to do this is to always print the comma first, but not on the first iteration.

```
int first = 1;
while (i <= '7') {
j = i + 1;
while (j <= '8') {
k = j + 1;
while (k <= '9') {
if (!first) {
write(1, ", ", 2);
} else {
first=0;
}
ft_putchar(i, j, k);
...
```