set a boolean in typescript

To set a boolean in TypeScript, you first need to declare a variable of type boolean:

index.ts
let isTrue: boolean;    // declare a boolean variable
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Then, you can assign a value to the variable using the boolean literals true or false:

index.ts
isTrue = true;          // assign true to isTrue
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or

index.ts
isTrue = false;         // assign false to isTrue
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Alternatively, you can declare and set a boolean variable in a single line:

index.ts
let isTrue: boolean = true;   // declare and set isTrue to true
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Boolean variables are useful for controlling the flow of a program, making decisions, or storing the state of a condition.