Floyd’s Triangle – Definition, Properties and More

Floyd’s Triangle – Definition, Properties and More

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Esha
Esha Gupta
Associate Senior Executive
Updated on Nov 24, 2023 14:26 IST

Floyd’s Triangle is a right-angled triangular array of natural numbers named after the American computer scientist Robert W. Floyd. Let us read more about it!

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Floyd’s Triangle is constructed by placing consecutive natural numbers in rows such that each row contains one more number than the previous row.

Also, Explore Pascal’s Triangle

Let’s see an example to understand it better.

1
2  3
4  5  6
7  8  9 10
... and so on

It is a simple geometric arrangement of numbers and is often used to understand programming concepts like nested loops and pattern printing.

 

It has the following properties:

  1. Consecutive Natural Numbers: Floyd’s Triangle consists of consecutive natural numbers arranged row by row, starting from 1 and increasing by 1 in each row.
  2. Triangular Shape: It forms a right-angled triangular pattern, where each row has one more number than the previous row.
  3. Each Row Starts with a New Number: The first number in each row is the next consecutive natural number from where the previous row left off. This property ensures that all numbers in the triangle are unique and in increasing order.
  4. Rows are Incremental: The number of rows in Floyd’s Triangle is determined by the number of natural numbers you want to include. For example, if you want to include the first 10 natural numbers, you would have a 4-row Floyd’s Triangle (1, 2, 3, 4, 5, 6, 7, 8, 9, 10 in four rows).
  5. Arbitrary Starting Number: While the most common form of Floyd’s Triangle starts with 1, you can create variations by starting with any other natural number and following the same pattern.
  6. Sum of Rows: The sum of the numbers in each row can be calculated using arithmetic progression formulas, making it an interesting mathematical exercise.
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Let’s See How We Can Print it Using C, C++, Python & Java.

 

Pattern :

 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 
29 30 31 32 33 34 35 36 
37 38 39 40 41 42 43 44 45 
46 47 48 49 50 51 52 53 54 55 

Using C

Code in C


 
#include <stdio.h>
int main() {
int n = 10;
int num = 1;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
printf("- ", num);
num++;
}
printf("\n");
}
return 0;
}
Copy code

Using C++

Code in C++


 
#include <iostream>
#include <iomanip>
int main() {
int n = 1;
for (int i = 1; i <= 10; i++) {
for (int j = 1; j <= i; j++) {
std::cout << std::setw(2) << n++ << " ";
}
std::cout << std::endl;
}
return 0;
}
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Using Python

Code in Python


 
n = 1
for i in range(1, 11):
for j in range(1, i + 1):
print(f"{n:2}", end=" ")
n += 1
print()
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Using Java

Code in Java


 
public class Main {
public static void main(String[] args) {
int n = 1;
for (int i = 1; i <= 10; i++) {
for (int j = 1; j <= i; j++) {
System.out.printf("- ", n++);
}
System.out.println();
}
}
}
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Thus, we printed Floyd’s triangle using different programming languages.

Applications of Floyd’s Triangle

There are so many applications of this concept, out of which a few are listed below:

  • It can be used to visualize sequences of natural numbers, which may have applications in number theory and mathematical explorations.
  • Floyd’s Triangle can be incorporated into puzzles, games, or quizzes where players must navigate or interact with the numbers in the triangle.
  • It is often used as an educational tool in programming, particularly for teaching concepts related to nested loops and pattern printing.
  • Floyd’s Triangle can be used as a visual element in graphic design, data visualization, or artistic representations.

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Conclusion

Thus, it is an amazing example of how seemingly simple can have deep and varied applications, showcasing the wonder and depth hidden within mathematics. Keep learning, keep exploring!

About the Author
author-image
Esha Gupta
Associate Senior Executive

Hello, world! I'm Esha Gupta, your go-to Technical Content Developer with a focus on Java, Data Structures and Algorithms, and Front End Development. Alongside these specialities, I have a zest for immersing myself ... Read Full Bio

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