Aprenda Switch Statement | Control Structures

The switch statement provides a convenient way to compare an expression against multiple values. Below is the basic syntax of the switch statement:

switch (expression) {
    case value1: {
        // Code to be executed if the expression equals value1
    }
    case value2: {
        // Code to be executed if the expression equals value2
    }
    case ...
    ...
    default: {
        // Code to be executed if the expression doesn't match any of the values
    }
}

Here are some important points regarding the switch statement:

The expression is evaluated once, and its value is compared against the values specified in each case;
The block of code under the matching case is executed, and the remaining cases are ignored;
If no case matches, the code block under default is executed. The default case is optional and can be left out.

Here is an example of how switch can be used in a program:

index.go


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package main
import "fmt"

func main() {
    // Let's create a program that prints a message based on the day of the week.
   
    dayOfWeek := 5 // Assuming it's Friday


    switch dayOfWeek {
        case 1:
            fmt.Println("It's Monday! Start the week with enthusiasm.")
        case 2:
            fmt.Println("It's Tuesday! Keep pushing forward.")
        case 3:
            fmt.Println("It's Wednesday! Halfway through the week.")
        case 4:
            fmt.Println("It's Thursday! Almost there, don't give up.")
        case 5:
            fmt.Println("It's Friday! Time to celebrate the weekend.")      
        case 6:
            fmt.Println("It's Saturday! Enjoy your day off.")
        case 7:
            fmt.Println("It's Sunday! Relax and recharge for the week ahead.")
        default:
            fmt.Println("Invalid day of the week.")
    }
}

Note

You can omit braces for the case code blocks.

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