Floyd’s triangle Number pattern using nested for in Java
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Floyd’s triangle Number pattern using nested for in Java
Floyd’s triangle Number pattern using nested for in Java
In this tutorial, we will learn about Floyd’s triangle Number pattern using nested for in Java language
Nested loops are(for, while,do-while) useful to create funny patterns as number patterns alphabet, Star patterns
We will learn in this tutorial about Triangle number pattern printing using nested for in Java
- write this program of your text editor
- save your file name like as class name and .java extension
- compile the program using Javac compiler
- finally, run the program (using .class file)
Program 1
package floyestrangle;
public class Floyestrangle {
public static void main(String[] args) {
int rows=7;//variable declaration and inilization
for(int i=1; i<=rows; i++){//nested for loop
for(int j=1; j<=i; j++){
System.out.print(j);
}
System.out.println();
}
}
}
When the above code is executed, it produces the following results:
1 12 123 1234 12345 123456 1234567
you can add some appropriate changes in this program
below we can try to some small changes
package floyestrangle;
import java.util.Scanner; //import scanner package
public class Floyestrangle {
public static void main(String[] args) {
System.out.println("welcome to print Floyd's triangle in java"); //add a description
System.out.println("please enter a number of rows :");
Scanner sc=new Scanner(System.in); //use input method
int rows=sc.nextInt(); //get input from user to print Floyd's triangle
for(int i=1; i<=rows; i++){
for(int j=1; j<=i; j++){
System.out.print(j +" ");//concatenate space in java
//get small space among the numbers
}
System.out.println();
}
}
}
In line 2- import scanner package
In line 5 – add a description
In line 7 – Use input method
In line 8 -get input from the user to print Floyd’s triangle
In line 11 – concatenate spaces
When the above code is executed, it produces the following results:
welcome to print floyd's triangle in java please enter a number of rows : 7 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 6 7
Program 2
import java.util.Scanner; //import scanner package
public class Floyestrangles
{
public static void main(String[] args) {
System.out.println("welcome to print Floyd's triangle in java"); //add a description
System.out.println("please enter a number of rows :");
Scanner sc=new Scanner(System.in); //user input method
int rows=sc.nextInt(); //get input from user to print Floyd's triangle
for(int i=1; i<=rows; i++){
for(int j=1; j<=i; j++){
System.out.print(i +" ");//concatenate space in java
//get small space among the numbers
} System.out.println();
}
}
}
When the above code is executed, it produces the following results:
welcomr to print floyd's triangle in java please enter a number of rows : 7 1 22 333 4444 55555 666666 7777777
Program 3
package floydstriang;
import java.util.Scanner;
public class Floydstriang {
public static void main(String[] args) {
System.out.println("welcome to print Floyd's triangle in java");
System.out.println("please enter a number of rows :");
Scanner sc=new Scanner(System.in);
int rows=sc.nextInt();
for(int i=10; i>=1; i--){
for(int j=1; j<=rows; j++){
System.out.print(j);
}
System.out.println();
rows=rows-1;
}
}
}
When the above code is executed, it produces the following results:
welcome to print floyd's triangle in java please enter a number of rows : 8 12345678 1234567 123456 12345 1234 123 12 1
Program 4
import java.util.Scanner;
class floydstriangle_3{
public static void main(String args[]){
int num=1,i,j,k;//Declare variable
System.out.println("floyd's triangle number pattern: ");
Scanner f3=new Scanner(System.in);
System.out.println("Enter the number of row of you want: ");
i=f3.nextInt(); //get input from user to print Floyd's triangle
System.out.println("Here your Floyd's triangle ");
for(j=1; j<=i; j++){
for(k=1; k<=j; k++){
System.out.print(num+" ");
num++;
}
System.out.println();
}
}
}
When the above code is executed, it produces the following results:
Floyd's triangle number pattern: Enter the number of row of you want: 7 Here your floyd's triangle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Program 5
import java.util.Scanner;
class floydstriangle_4{
public static void main(String args[]){
int num=1,i,j,k; //variable declaration
System.out.println("Floyd's triangle number pattern: ");
Scanner f3=new Scanner(System.in);
//cretae a new scanner object
System.out.println("Enter the number of row of you want: ");
int row =f3.nextInt();//get the input from user
System.out.println("Here your Floyd's triangle ");
num=row*(row+1)/2;
for(j=1; j<=row; j++){
for(k=1; k<=j; k++){
System.out.print(num+" ");
num--;
}
System.out.println();
}
}
}
When the above code is executed, it produces the following results:
Floyd's triangle number pattern: Enter the number of row of you want: 7 Here your Floyd's triangle 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Program 6
//package Floyd's_triangle;
import java.util.Scanner; //import scanner package
public class Floyd's_trangle6
{
public static void main(String args[]) {
System.out.println("welcome to print Floyd's triangle in Java"); //add a description
System.out.println("please enter the number of rows :");
Scanner sc=new Scanner(System.in); //user input metod
int rows=sc.nextInt(); //get input from user to print Floyd's triangle
for(int i=1; i<=rows; i++){
int k=i;
for(int j=1; j<=rows; j++){
if(j<i)
System.out.print(" ");
else
System.out.print(k++);
}
System.out.println("");
}
}
}
When the above code is executed, it produces the following results:
welcome to print Floyd's triangle in Java
please enter the number of rows :
6
1 2 3 4 5 6
2 3 4 5 6
3 4 5 6
4 5 6
5 6
6
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