Syntax for an If statement using a boolean

Question

I just recently joined the python3 HypeTrain. However I just wondered how you can use an if statement onto a boolean. Example:

RandomBool = True
# and now how can I check this in an if statement? Like the following:
if RandomBool == True:
    # DoYourThing

And also, can I just switch the value of a boolean like this?

RandomBool1 == True # Boolean states True
if # AnyThing:
    RandomBool1 = False # Boolean states False from now on?

"if Check6228 == False: UnboundLocalError: local variable 'Check6228' referenced before assignmen" — Lucidity
– Lucidity, Commented Jul 17, 2016 at 16:26
Value assignment uses the = operator, == checks for equality. — miradulo
– miradulo, Commented Jul 17, 2016 at 16:27

Michal · Accepted Answer · 2023-09-15 08:04:36Z

126

You can change the value of a bool all you want. As for an if:

if randombool is True:

works, but you can also use:

if randombool:

If you want to test whether something is false you can use:

if randombool is False

but you can also use:

if not randombool:

edited Sep 15, 2023 at 8:04

Michal

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answered Jul 17, 2016 at 16:28

Mathime

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1 Comment

ao_martinv Over a year ago

This answer could be completed with the response from @user15547210 I think "if randombool is True:" might be longer than "if randombool:", but it's also more intuitive than both options here. Anyway, the three form the complete set for anyone to choose from.

user15547210 · Accepted Answer · 2021-04-03 19:55:16Z

15

I think You could also just use

if randombool is True:

elif randombool is False:

I don't think you need to use equal signs unless it's an int or float.

Correct me if I'm wrong

answered Apr 3, 2021 at 19:55

user15547210

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1 Comment

Daenerys Over a year ago

This should be voted the right answer!

jaredlee.dev · Accepted Answer · 2023-03-29 16:33:20Z

2

According to PEP 8, it looks like we should just be using

if RandomBool:

or

if not RandomBool:

I believe is compares memory addresses, and PEP 8 says we shouldn't compare bools with ==:

See PEP 8 here

answered Mar 29, 2023 at 16:33

jaredlee.dev

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