let func1 = (a, b) => a + b; console.info(func1(1, 1)); let func2 = (a, b) => {a + b}; console.info(func2(1, 1)); let func3 = (a, b) => {return a + b}; console.info(func3(1, 1));
undefined 2 2
undefined undefined 2
2 undefined 2
2 2 2
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