Q. Write an algorithm and program to print Floyd's triangle.

Solution : Here you will find an algorithm and program to print Floyd's triangle. Given a numbers of line n and our task is to print Floyd's triangle.

Floyd's triangle :- Floyd's triangle is a right-angled triangular array of natural numbers, used in computer science education.It is named after Rober Floyd. Floyd's triangle starts from 1 and consecutively selects the next greater number in sequence.
For Example :-
Input : Enter the Floyd's triangle lines: 4
Output :
1
2 3
4 5 6
7 8 9 10
Explanation : As we can see that input triangle lines: N = 4. The output should look like Floyd's triangle. In this, we are using nested loop to print traingle. Outer loop i will start from 1 to n and inner loop j will start from 1 to i+1.

Floyd's Triangle Algorithm

//Algorithm To Print Floyd's triangle
START
Step 1 ->  Take Floyd's triangle input line n.
Step 2 ->  Set val=1;
Step 3 ->  for loop i to n:
for loop j to i+1:
print val
val+=1 
loop end
Give one line space using.
loop end                               
STOP

Floyd's Triangle Program

C++

Java

Python

PHP

//C Program To Print Floyd's Triangle.
#include <stdio.h>
int main(){ 
int i,j=1,n;
printf("Enter the Floyd's triangle lines :");
scanf("%d",&n);
for (i=1;i<=(n*(n+1))/2;i++){ 
printf("%d ",i); 
if(i==(j*(j+1))/2){ 
printf("\n"); 
j++; 
} 
}   
return 0;
}

//C++ Program To Print Floyd's Triangle.
#include <iostream>
using namespace std; 
int main() 
{ 
int i,j=1,n;
cout<<"Enter the Floyd's triangle lines :";
cin>>n;
for (i=1;i<=(n*(n+1))/2;i++){ 
cout<<i<<" "; 
if(i==(j*(j+1))/2){ 
cout<<"\n"; 
j++; 
} 
}  
return 0; 
}

//Java Program To Print Floyd's Triangle.
import java.util.Scanner;
public class LFC
{
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.print("Enter the Floyd's triangle lines :");
int n = scan.nextInt();
int i, j, val = 1; 
for (i = 1; i <= n; i++) 
{ 
for (j = 1; j <= i; j++) 
{ 
System.out.print(val + " "); 
val++; 
} 
System.out.println(); 
} 
}
}

//Python Program To Print Floyd's Triangle.
print('Enter the Floyd's triangle lines :')
n = int(input())
val = 1
for i in range(1, n + 1): 
for j in range(1, i + 1): 
print(val, end = " ") 
val += 1
print("")

//C# Program To Print Floyd's Triangle.
using System;
class LFC {
static void Main() {
int i, j, val = 1;
Console.Write("Enter the Floyd's triangle lines :");      
int n= int.Parse(Console.ReadLine());  
for (i = 1; i <= n; i++) 
{ 
for (j = 1; j <= i; j++) 
{ 
Console.Write(val + " "); 
val++; 
} 
Console.WriteLine(); 
} 
}
}

//PHP Program To Print Floyd's Triangle.
<?php
$n=4;
$val = 1; 
// loop for number of lines 
for($i = 1; $i <= $n; $i++) 
{ 
// loop for number of elements 
// in each line 
for($j = 1; $j <= $i; $j++) 
{ 
print($val." "); 
$val++; 
} 
print("\n"); 
} 
?>

//C Program To Print Floyd's Triangle.
#include <stdio.h>
int main(){ 
int i,j=1,n;
printf("Enter the Floyd's triangle lines :");
scanf("%d",&n);
for (i=1;i<=(n*(n+1))/2;i++){ 
printf("%d ",i); 
if(i==(j*(j+1))/2){ 
printf("\n"); 
j++; 
} 
}   
return 0;
}

Output

Enter the Floyd's triangle lines :4
1
2 3
4 5 6
7 8 9 10

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