Program to print number 1..n as right triangle.

prog.c

#include <stdio.h>

int main(void) {
 int i,j,rows;
    printf("Enter the nth number of series: ");
    scanf("%d",&rows);
    printf("\n");
    for(i=1;i<=rows;++i)
    {
        for(j=1;j<=i;++j)
        {
          
            printf("%d ", j);
        }
        printf("\n");
    }
    return 0;
}