Go break statement

Go break statement is used to break out of its immediate surrounding loop.

Go break statement can be used to break a for loop or to break a switch statement.

In this tutorial, we will learn how to use a break statement to break for loop or a switch statement.

Syntax

The syntax of break statement is

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break

Examples

Break For Loop

In the following program, we will break the for loop when the value of x is equal to 5.

example.go

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package main

import "fmt"

func main() {
	var i int = 0
	for i < 50 {
		if i == 5 {
			break
		}
		fmt.Println(i)
		i = i + 1
	}
}

Output

0
1
2
3
4

Without break statement, for loop would have executed until i is 50. But, break statement has broken the for loop when i == 5.

Break in Nested For Loop

In this example, we write a nested for loop, and use break statement to break inner loop. break statement can break only the loop it is immediate to it.

example.go

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package main

import "fmt"

func main() {
	var n int = 5
	var i int = 0
	for i < n {
		var k int = 0
		for k < n {
			fmt.Print("* ")
			if i == k {
				break
			}
			k = k + 1
		}
		fmt.Println()
		i = i + 1
	}
}

Output

* 
* * 
* * * 
* * * * 
* * * * *

Break in Switch Statement

In this example, we write a nested for loop, and use break statement to break inner loop. break statement can break only the loop it is immediate to it.

example.go

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package main

import "fmt"

func main() {
	var n int = 0
	var today int = 2

	switch today {
	case 1:
		fmt.Printf("Today is Monday")
		fmt.Printf("Hello World")
	case 2:
		fmt.Printf("Today is Tuesday")
		if n == 0 {
			break
		}
		fmt.Printf("Hello World")
	case 3:
		fmt.Printf("Today is Wednesday")
		fmt.Printf("Hello World")
	default:
		fmt.Printf("Hello World")
	}
}

Output

Today is Tuesday

Conclusion

In this Golang Tutorial, we learned about break statement, and how to use it to break a for loop or switch statement, with the help of examples.