Program using " Nested loop "

#include<iostream.h>
#include<stdio.h>
void main()
{
clrscr();
char c;
int i,j;
c='A';
for(i=1;i<=5;i++)
{
    for(j=1;j<=i;j++)
    {
        putchar(c);
    }
    putchar('\n');
    fflush(stdout);
}
}

The output of this program will be:-

A
BB
CCC
DDDD
EEEEE