Golang Program to Build Right Triangle Using Numbers

In this article, we will write Golang programs to build a right triangle using numbers. The numbers imply that the triangle is composed of numbers. There are many ways to perform this operations, here we have used different examples to provide a better understanding of the concept.

Demonstration

This demonstration explains a right angled triangle representation using numbers. Each row of this triangle is consist of number starting from 1 to the row number. From top the first row has 1, second row has 1, 2 and it goes on.

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 5 6

Algorithm

• Step 1 ? This program imports the fmt and main package in the program where fmt helps in the formatting of input and output and main helps in generating of executable codes

• Step 2 ? In the main function set a variable named rows with some value which indicates no. of rows of the triangle

• Step 3 ? Use a nested for loop with i variable in the outer loop and j variable in the inner loop

• Step 4 ? In the inner loop print the jth element in every iteration using %d format specifier

• Step 5 ? Print new line after every row is printed on the console

Example 1

In this example, right triangle with numbers is printed by using %d format specifier in the nested for loop with i variable in outer loop and j variable in inner loop.

package main

import "fmt"

func main() {
   rows := 6

   for i := 1; i<= rows; i++ {
      for j := 1; j <= i; j++ {
         fmt.Printf("%d ", j)
      }
      fmt.Println()
   }
}

Output

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 5 6

Example 2

In this example, we will write a Golang program to build right triangle. The numbers will be printed in pattern by using space with the element.

package main

import "fmt"

func main() {
   rows := 6
   for i := 1; i<= rows; i++ {
      for j := 1; j <= i; j++ {
         fmt.Print(j, " ")
      }
      fmt.Println()
   }
}

Output

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 5 6

Conclusion

We executed and concluded the program of printing left triangle pattern using two examples. In the first example, %d format specifies is used and in the second example, space is used along with the element of the row.