SubhanUllah Posted October 4, 2022 Report Posted October 4, 2022 Both do exactly the same if and only if value===undefined. The following example demonstrates the differences. function f1() { } // no return statement returns undefined. function f2() { return; } // returns undefined too. The undefined is implicit here. function f3() { return undefined; } // explicitly returns undefined function f4() { return 1; } // returns 1. console.log('f1() === ' + f1()); // prints: f1() === undefined console.log('f2() === ' + f2()); // prints: f2() === undefined console.log('f3() === ' + f3()); // prints: f3() === undefined console.log('f4() === ' + f4()); // prints: f4() === 1 Quote
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