Golang Program To Print Diamond Star Pattern

In this tutorial, we will learn how to print diamond star pattern using Go programming language.

Syntax

for initialization; condition; update {
   statement(s)
}

Example: Golang Program Code To Print Diamond Star Pattern Using A Single Function

Algorithm

• Step 1 − Import the package fmt.

• Step 2 − Start the function main ().

• Step 3 − Declare and initialize the variables.

• Step 4 − Use of for loop with condition and incrementor.

• Step 5 − Print the result using fmt.Println ().

Example

// GOLANG PROGRAM TO PRINT DIAMOND STAR PATTERN
package main

// fmt package provides the function to print anything
import "fmt"

// start the function main ()
// this function is the entry point of the executable program
func main() {

   // Declare the integer variables
   var x, y, z, rows int
   
   // initialize the rows variable
   rows = 8
   fmt.Scanln(&rows)
   fmt.Println("GOLANG PROGRAM TO PRINT DIAMOND STAR PATTERN")
   
   // Use of For Loop for the upper half
   for x = 1; x <= rows; x++ {
      // This loop starts when y = 1
      // executes till y<=rows condition is true
      // post statement is y++
      for y = 1; y <= rows-x; y++ {
         fmt.Printf(" ")
      }
      for z = 1; z <= x*2-1; z++ {
         fmt.Printf("*")
      }
      fmt.Println()
   }
   // Use of For Loop for the lower half
   for x = rows - 1; x > 0; x-- {
   
      // This loop starts when y = 1
      // executes till y<=rows condition is true
      // post statement is y++
      for y = 1; y <= rows-x; y++ {
         fmt.Printf(" ")
      }
      for z = 1; z <= x*2-1; z++ {
         fmt.Printf("*")
      }
      fmt.Println()
      // print the result using fmt.Println () function
   }
}

Output

GOLANG PROGRAM TO PRINT DIAMOND STAR PATTERN
       *
      ***
     *****
    *******
   *********
  ***********
 *************
***************
 *************
  ***********
   *********
    *******
     *****
      ***
       *

Description Of The Code

• In the above program, we first declare the package main.

• We imported the fmt package that includes the files of package fmt.

• Now start the function main () and this function is the entry point of the executable program. It does not take any argument nor return anything.

• Declare the four integer variables x, y, z and rows. Initialize the rows variable to an integer value you want for the number of rows of the diamond star pattern. Here, fmt.Scanln () function is used to read and store the rows value.

• Using for loop − The condition is given inside an if statement and stop execution is mentioned once the condition is right. In the code the for loop starts when x := rows – 1 ,y := 1 and i = 1.

• And finally printing the result in the form of a diamond shape on the screen using fmt.Println () function which formats using the default formats for its operands and writes to standard output.

Conclusion

We have successfully compiled and executed the Golang program code to print diamond star pattern in the above example.