Go by Example : If/Else

The if statement in Go is used to execute a block of code if a condition is met. The if statement can also be combined with an else statement to execute a different block of code if the condition is not met.

Here’s an example of an if statement in Go:

package main

import "fmt"

func main() {
    x := 10
    if x > 5 {
        fmt.Println("x is greater than 5")
    }
}

In this example, the condition x > 5 is evaluated and if it is true, the message "x is greater than 5" is printed.

Here’s an example of an if statement combined with an else statement in Go:

package main

import "fmt"

func main() {
    x := 5
    if x > 10 {
        fmt.Println("x is greater than 10")
    } else {
        fmt.Println("x is not greater than 10")
    }
}

In this example, the condition x > 10 is evaluated and if it is true, the message "x is greater than 10" is printed. If the condition is not met, the message "x is not greater than 10" is printed.

It is also possible to chain multiple if statements together using else if:

package main

import "fmt"

func main() {
    x := 15
    if x > 20 {
        fmt.Println("x is greater than 20")
    } else if x > 10 {
        fmt.Println("x is greater than 10 but not greater than 20")
    } else {
        fmt.Println("x is not greater than 10")
    }
}

In this example, the first condition x > 20 is evaluated. If it is true, the message "x is greater than 20" is printed. If it is not true, the next condition x > 10 is evaluated, and if it is true, the message "x is greater than 10 but not greater than 20" is printed. If both conditions are not met, the message "x is not greater than 10" is printed.

In this tutorial, we’ve covered the if statement in Go and how to use it with an else statement. The if statement is a powerful tool for controlling the flow of execution in a Go program.