PythonString methods
str.
Returns a copy of the string written in uppercase letters.
- Returns
- A new string in uppercase.
- Changes the original
- No
Example
#Python
course = "python course"
print(course.upper())
print(course)
print("café 🐢".upper())Resultsaved result, you can check it
PYTHON COURSE
python course
CAFÉ 🐢
Definition and usage
#The upper() method returns a new string in which every letter is uppercase. The original stays the same, because strings in Python are immutable. You need to assign the result to a variable.
It works correctly with accented characters: "café".upper() is "CAFÉ". Characters that are not letters stay unchanged.
It is often used for case-insensitive comparisons, though the casefold() method is even better for that, since it also handles special cases from other languages.
Syntax
#Syntax
string.upper()Good practices
#- Remember to assign the result:
name = name.upper(). Just callingname.upper()does not change the variable. - To check whether a string is already uppercase, use
isupper().
Related entries
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