Else statement does not get executed in Javascript

Question

Hello I've been trying to write a function to validate a string value. My code is below

function verifyPassword(){
passW = prompt ("Password:");

if (passW = 'Pass123'){
  document.write ('Your password is correct');
}
else {

  document.write ('Your password is incorrect');
}
}

verifyPassword();

But here I always seem to get the result as 'Your password is correct', no matter what I put.

Please can someone help me to resolve this issue?

`passW = 'Pass123'` is always true, and should have been `passW == 'Pass123'`, which makes this question a simple typographic error, which is off-topic. — zzzzBov, Feb 09 '16 at 18:01

score 2 · Answer 1 · answered Feb 09 '16 at 18:01

2

The comparation-operator in Javascript is ==. The = operator is for assignment and returns the assigned value. So your code is equivalent to:

passW = 'Pass123';
if (passW){
  document.write ('Your password is correct');
}

Use if (passW == 'Pass123') instead.

By the way, I hope you are not really trying to implement authentication and access control with client-sided javascript.

answered Feb 09 '16 at 18:01

Philipp

67,764
9
118
153

No it's just a simple example – user5904632 Feb 09 '16 at 18:14

score -1 · Accepted Answer · answered Feb 09 '16 at 18:02

-1

do

function verifyPassword(){
passW = prompt ("Password:");

if (passW == 'Pass123'){
  document.write ('Your password is correct');
}
else {

  document.write ('Your password is incorrect');
}
}

verifyPassword();

answered Feb 09 '16 at 18:02

Jasmin Mistry

1,459
1
18
23

Else statement does not get executed in Javascript

2 Answers2