I can't get it, help please

Question

https://code.sololearn.com/cO42lwOh44Og/?ref=app

Answer 1

with only one loop:

https://code.sololearn.com/c9Rrk518ue9R/?ref=app

Answer 2

Ira Sarkar
#include <stdio.h>
int main() {
int rows, i, j, number = 1;
scanf("%d", &rows);
for (i = 1; i <= rows; i++) {
for (j = 1; j <= i; ++j) {
printf("%d ", number);
++number;
}
printf("\n");
}
return 0;
}

Answer 3

Thanks visph
Sâgærāvürï