Go Program to Print Hollow Box Number Pattern

Write a Go Program to Print Hollow Box Number Pattern of 1’s. In this Golang Hollow Box Number pattern example, the nested for loop iterates rows and columns. The if statement (if i == 1 || i == row || j == 1 || j == col) checks whether it is a first row or first column or last row or last column. If true, print 1’s; otherwise, it prints empty space.

package main

import "fmt"

func main() {

    var i, j, row, col int

    fmt.Print("Enter the Hollow Box Rows and Columns = ")
    fmt.Scan(&row, &col)

    fmt.Println("Hollow Box Number Pattern")
    for i = 1; i <= row; i++ {
        for j = 1; j <= col; j++ {
            if i == 1 || i == row || j == 1 || j == col {
                fmt.Print("1 ")
            } else {
                fmt.Print("  ")
            }
        }
        fmt.Println()
    }
}

Enter the Hollow Box Rows and Columns = 7 22
Hollow Box Number Pattern
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 
1                                         1
1                                         1 
1                                         1 
1                                         1 
1                                         1 
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

Golang Program to Print Hollow Box Number Pattern of 0’s

In this Hollow Box Number Pattern example, we replaced 0 with 1.

package main

import "fmt"

func main() {

    var i, j, row, col int

    fmt.Print("Enter the Hollow Box of 0's Rows and Columns = ")
    fmt.Scan(&row, &col)

    fmt.Println("Hollow Box Number Pattern of 0's")
    for i = 1; i <= row; i++ {
        for j = 1; j <= col; j++ {
            if i == 1 || i == row || j == 1 || j == col {
                fmt.Print("0 ")
            } else {
                fmt.Print("  ")
            }
        }
        fmt.Println()
    }
}

Enter the Hollow Box of 0's Rows and Columns = 8 20
Hollow Box Number Pattern of 0's
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0                                     0 
0                                     0 
0                                     0 
0                                     0 
0                                     0 
0                                     0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 

This Golang example allows entering the number and prints that number in a hollow box pattern.

package main

import "fmt"

func main() {

    var i, j, row, col, num int

    fmt.Print("Enter the Hollow Box Rows and Columns = ")
    fmt.Scan(&row, &col)

    fmt.Print("Enter the Number to Print Hollow Box = ")
    fmt.Scanln(&num)

    fmt.Println("Hollow Box Number Pattern")
    for i = 1; i <= row; i++ {
        for j = 1; j <= col; j++ {
            if i == 1 || i == row || j == 1 || j == col {
                fmt.Printf("%d ", num)
            } else {
                fmt.Print("  ")
            }
        }
        fmt.Println()
    }
}