Python if statement uses the in
operator, it can see if a particular value is present. Python “if in statement” makes decisions.
Python if in
Simple example code If statements that check for values: if
with in
. The if statement has the in operator to see whether exampleStr contains the ‘gene’ phrase.
exampleStr = "Python is a general-purpose programming language."
# Look for substring in source string
if 'gene' in exampleStr:
print("Found! 'gene'.")
else:
print("Didn't find the substring.")
Output:

If statement that sees if a list has a certain value
Use the in
operator is to see if some list has a particular value
sickDays = [2, 1, 0, 0, 5, 8, 4, 9]
# Check for 9 absence days
if 9 in sickDays:
print('Ouch, someone was sick 9 days in a row!')
else:
print("We don't have anyone sick 9 consecutive days.")
Do comment if you have any doubts or suggestions on this Python if code.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.