TypeScript | Type Annotation and Inference in TypeScript | Question5

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How do you explicitly declare a function’s return type in TypeScript?

function add(a: number, b: number) -> number {}

function add(a: number, b: number): number {}

function add(a: number, b: number) = number {}

function add(a: number, b: number) returns number {}

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Type Annotation and Inference in TypeScript
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