Im very new to Python and decided I would try some basics.
Why does this always evaluate to true? Typing in "False" as UserInput should evaluate False?
true_or_false=input("Is it true or false?")
if true_or_false:
print("It's true")
if not true_or_false:
print("Well,it is not true")
Using newest Python Version (3.smth)
The if condition evaluates the "truthiness" of the object passed to it:
if object:
...
Is the same as:
if bool(object):
...
You'll see any string of length greater than 0 has a truthiness value of True:
In [82]: bool('True')
Out[82]: True
In [83]: bool('False')
Out[83]: True
In essence, you'll need to change your if to:
if string == 'True':
...
elif string == 'False':
When using strings in comparisons, use the == operator unless you know what you're doing.
In addition, it is useful to know about the truthiness of some other python builtins:
In [84]: bool(None)
Out[84]: False
In [85]: bool({})
Out[85]: False
In [86]: bool([])
Out[86]: False
In [87]: bool(['a'])
Out[87]: True
true_or_false=input("Is it true or false?")
will give the variable true_or_false a string value.
if true_or_false
will test if that's an empty string or not.
The solution is to compare the string to a string value:
if true_or_false == 'True'
If you want to guard against errors with upper- and lowercase letters you can do like this:
if true_or_false.lower() == 'true'
Strings in python always evaluate to True unless they are empty. You need to check if the string equals to "True"
