Python String upper()

Python String upper() method converts all lowercase characters in a string into uppercase characters and returns it. In this article, we’ll explore Python’s upper() method in-depth.

Python String upper() Syntax

Syntax: string.upper()

Parameters: The upper() method doesn’t take any parameters. 

Returns: returns an uppercased string of the given string.

String upper() in Python Example

Here we are using the string upper() in Python.

Output

GEEKS FOR GEEKS

String with Case-Insensitive Comparison

In this example, we will take GFG as a user input to check for Python String and apply the string upper() function to check for case-sensitive comparison.

Output

Enter your choice: No 
You didn't choose 'GFG'.

String with only Alphabetic Characters

In this example, we will take only alphabet characters, both lower and upper case characters as a Python String and apply the string upper() function to it.

Output

Original String:
geeKs For geEkS
Converted String:
GEEKS FOR GEEKS

String with Alphanumeric Characters 

In this example, we will take alphanumeric characters, i.e., a mixture of alphabets and numeric values, and then apply the string upper() function in Python.

Output

Original String:
g3Ek5 f0r gE3K5
Converted String:
G3EK5 F0R GE3K5

Use of upper() methods used in a Python Program

One of the common applications of the upper() method is to check if the two strings are the same or not. We will take two strings with different cases, apply upper() to them, and then check if they are the same or not.

Output

Strings are same