Program to Print Triangle Pattern in java

Step 1. Open the Notepad.

Step 2. Now just Copy and Paste the code in Notepad.

import java.io.*;
class triangle {
public static void main ( String yaarnotechnology[] ){
InputStreamReader istream = new InputStreamReader(System.in) ;
BufferedReader read = new BufferedReader(istream) ;
System.out.print("Enter Triangle Size : ");
int num=0;
try{
num=Integer.parseInt( read.readLine() );
} catch(Exception Number){
System.out.println("Invalid Number!");
}
for(int i=1;i<=num;i++){
for(int j=1; j < num- (i-1); j++){
System.out.print(" ");
}
for(int k=1; k<=i; k++){
System.out.print("*");
for(int k1=1; k1 < k; k1 += k){
System.out.print("*");
}
}
System.out.println();
}
}
}