CODEWITHSUNDEEP
typescript
csb00
csb00

Reputation: 1155

What does void do/mean in typescript?

I am learning typescript, and I came across this switch statement in a tutorial. I know that number is assigned to a, so all parameters should be numbers. But, what does void mean and do?

function switchFunction(a: number): void {
    switch (a) {
        case 1:
            let variableInCase1 = "test";
            console.log(variableInCase1);
            break;
        case 2:
            let variableInCase2 = "test2";
            console.log(variableInCase2);
            break;
        default:
          console.log("Default");    
    }
}
switchFunction(1);
switchFunction(2);
switchFunction(3);

Upvotes: 0

Views: 34

Answers (1)

Ross Sheppard
Ross Sheppard

Reputation: 870

It means that the function is not expecting a return value, evident in the fact that there is no return statement. In other words, the function can only equate to null or undefined.

https://www.typescriptlang.org/docs/handbook/basic-types.html#void

Upvotes: 1

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