Program to print pyramid of prime numbers.

import java.util.*;
class Pyd
{
public static void main(String ar[])
{
int m,k=2,flag=0,row;
for(row=1;row<=3;row++)
{
for(int i=1;i<=3-row;i++)
{
System.out.print(" ");
}
m=1;
while(m<=row)
{
flag=0;
for(int i=2;i<=k/2;i++)
{
if(k%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
System.out.print(k+" ");
m++;

}

k++;

}
System.out.println();
}
}
}


Output:-


C:\Documents and Settings\Administrator>cd\

C:\>cd java

C:\java>cd bin

C:\java\bin>javac Pyd.java

C:\java\bin>java Pyd
2
3 5
7 11 13