Why does the code work incorrectly?

Question

Code:

var a = 0; prompt("Введите свой возраст ниже",a); if (a<18) { alert("Вам сюда нельзя!"); } else { alert("Добро пожаловать!"); }

For some reason, the condition is always satisfied, if we declare a variable and, without assigning a value, it works normally. Why?

meine meine 3,466 2 6 nineteen · Accepted Answer · 2019-03-28T08:53:12

prompt - takes 2 arguments, 1st line with message, 2nd default value

In your case, your entered data is not recorded anywhere. and it turns out that a always = 0

 var a = prompt("Введите свой возраст ниже"); if (a<18) {alert("Вам сюда нельзя!");} else {alert("Добро пожаловать!");}

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