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String Built-in Functions
Python includes the following built-in functions to manipulate strings:
len(): The len() function calculates and returns the length of a string supplied as an argument.
Syntax of using len() function is:
len(string_name)
lower(): The lower() function converts all uppercase letters to lowercase. Syntax of using lower()
function is:
string_name.lower()
upper(): The upper() function converts all lowercase letters to uppercase. Syntax of using upper()
function is:
string_name.upper()
capitalize(): The capitalize() function returns a string with the first character in capital. Syntax of
using capitalize() function is:
string_name.capitalize()
Program 10: To use various string built-in functions.
Program10.py
File Edit Format Run Options Window Help
str = 'Hello'
print(len(str))
print('Hello'.lower())
print('hello'.upper())
print('hello'.capitalize())
You will get the following output:
Output
5
hello
HELLO
Hello
Let’s CatCh uP
1. What is a string?
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2. What are escape sequences?
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Functions and String in Python 159

