Arrow function without curly braces

Question

I\'m new to both ES6 and React and I keep seeing arrow functions. Why is it that some arrow functions use curly braces after the fat arrow and some use parentheses? For exam

Answer 1

Actually in a briefcase when somebody uses braces in an arrow function declaration, it is equal to below:

const arrow = number => number + 1;

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const arrow = (number) => number + 1;

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const arrow = (number) => ( number + 1 );

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const arrow = (number) => { return number + 1 };