Java Program to Generate Floyd's Triangle

Java Program to Generate Floyd's Triangle using nested for loop

This java program prints Floyd's triangle using for loop.

Reads the number of rows as user input and prints the required rows as Floyd's triangle.

In Floyd triangle, if there are n elements in n'th row then total number of elements in the triangle is (n(n+!))/2.

import java.util.*; 

class FloydsTriangle
{ 
   public static void main(String args[]) { 
 	Scanner Sc=new Scanner(System.in);
 	System.out.println("Floyd's Triangle"); 
 	System.out.println("-----------------"); 
 	System.out.println("Enter the number of rows: "); 
 	int  rows=Sc.nextInt();
 	int number = 1;
 	for(int c=1;c<=rows;c++){
 		for(int d=1;d<=c;d++){
 			System.out.print(number +"\t");
 			number++;
 		}
 		System.out.println();
 	}
   } 
} 

D:\Java_Programs>javac FloydsTriangle.java
D:\Java_Programs>java FloydsTriangle
Floyd's Triangle
-----------------
Enter the number of rows: 
5
1	
2	3	
4	5	6	
7	8	9	10	
11	12	13	14	15

Java Program to Generate Floyd's Triangle using nested while loop

import java.util.*; 

class FloydsTriangle
{ 
   public static void main(String args[]) { 
 	Scanner Sc=new Scanner(System.in);
 	System.out.println("Floyd's Triangle"); 
 	System.out.println("-----------------"); 
 	System.out.println("Enter the number of rows: "); 
 	int  rows=Sc.nextInt();
 	int number = 1;
 	int c=1;
 	while(c<=rows){
 		int d=1;
 		while(d<=c){
 			System.out.print(number +"\t");
 			number++;	
 			d++;
 		}
 		System.out.println();
 		c++;
 	}
   } 
} 

D:\Java_Programs>javac FloydsTriangle.java
D:\Java_Programs>java FloydsTriangle
Floyd's Triangle
-----------------
Enter the number of rows: 
6
1	
2	3	
4	5	6	
7	8	9	10	
11	12	13	14	15	
16	17	18	19	20	21