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salida del fragmento de javascript? declaraciones de variables javascript

Mi primera suposición es que el siguiente código tiene la salida de 10 y 100. Sin embargo, después de ejecutar el código obtengo undefined y 100 y no entiendo por qué la función no ve la primera declaración de x..

 var x = 10; function f() { console.log(x); var x = 100; console.log(x); } f();

about 4 years ago · Juan Pablo Isaza
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