Condition Construct in GOLang

Conditional programming is a very important construct available in all the programming languages.

Go provides 2 conditional programming constructs

1. If else
2. Switch

If Else

This is a very basic construct and is similar to most of the other languages.

If else can be written in the following way:

package main
import "fmt"
func main() {
	i := 10
	if i > 10 {
		fmt.Println("Greater than 10")
	} else {
		fmt.Println("Less than 10")
	}
}

We can also create an IF Else ladder in Golang

package main
import "fmt"
func main() {
	i := 7
	if i > 10 {
		fmt.Println("Greater than 10")
	} else if i > 5 {
		fmt.Println("Greater than 5")
	} else {
		fmt.Println("Less than 5")
	}
}

Switch Statement

Another alternative to IF Else is a Switch statement which is quite useful in Golang.

Following is a very basic example of a switch statement

package main
import "fmt"
func main() {
	j := 2
	switch j {
	case 1:
		fmt.Println("one")
	case 2:
		fmt.Println("two")
	case 3:
		fmt.Println("three")
	}
}

We can also use logical statements and more than one statement in GO.

Following code shows using logical statements in Switch

package main
import "fmt"
func main() {
	j := 2
	switch {
	case j < 5:
		fmt.Println("one")
	case j > 5:
		fmt.Println("two")
	case j == 5:
		fmt.Println("three")
	}
}

Following shows using multiple values in switch and default

package main
import "fmt"
func main() {
	j := 5
	switch j {
	case 1, 2:
		fmt.Println("one,two")
	case 4:
		fmt.Println("four")
	default:
		fmt.Println("default")
	}
}

This shows default and switch constructs and we don’t need to use a break after all the conditions.

I hope the content helps you.

You can learn about the arrays in my previous blog.

Happy Learning.