9.2.c

#include<stdio.h>
int main()
{
    int i,j;
    for (i=1;i<=4;i++){
        //int k=4;
        for(j=1;j<=i;j++){
            printf("%d ",j);
            //k++;
            
            
        }
        printf("\n");
        
    }
    return 0;
}