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switch case block scope

kid amogus answered on February 14, 2022 Popularity 3/10 Helpfulness 1/10

answer switch case block scope

switch case block scope

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let number  = 2;

switch (number) {
    case 1: 
        let message = "first number";
        console.log(message)
        break;
    case 2:
        let message = "second number";
        console.log(message)
        break;
  case 3:
        let message = "third number";
        console.log(message)
        break;
    default
        let message = "second number";
        console.log(message)
        break;
}

//This throws a syntax error: identifier "message" 
//has already been declared

//Here is a way to fix this issue:

let number  = 2;

switch (number) {
    case 1: { // braces make the case statement a block
        let message = "number" + number; // this remains in this block
        console.log(message)
        break;
    }
    case 2: {
        let message =  "number" + number; // this is a valid syntax
        console.log(message)
        break;
    }
    case 3: {
        let message = "number" + number; 
        console.log(message)
        break;
    }
    default
        let message =  "number" + number;
        console.log(message)
        break;
}

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: dev.to

Tags: block case javascript scope

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Contributed on Feb 14 2022

kid amogus

0 Answers Avg Quality 2/10

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