Program 21:
Output:
#include<stdio.h>
main()
{
int i,j,k,count=2;
for(i=1;i<=5;i+=2)
{
for(k=1;k<=count;k++)
{
printf(" ");
}
count--;
for(j=1;j<=i;j++)
{
printf("*");
}
printf("\n");
}
count=1;
for(i=3;i>=1;i-=2)
{
for(k=1;k<=count;k++)
{
printf(" ");
}
count++;
for(j=i;j>=1;j--)
{
printf("*");
}
printf("\n");
}
}
Explanation:
This is same as the programOutput:



