Page 135 - 2622_Delhi Police Public School_C-8

Factbot

There are around 700 separate programming languages. Some of the most popular ones are JavaScript,
Swift, Scala, Python, PHP, Go, Rust, Ruby and C#.

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. The
syntax of using the len() function is:
len(string_name)

lower(): The lower() function converts all uppercase letters to lowercase. The syntax of using the
lower() function is:
string_name.lower()

upper(): The upper() function converts all lowercase letters to uppercase. The syntax of using the
upper() function is:

string_name.upper()

capitalize(): The capitalize() function returns a string with the first character in capital and the rest
in lowercase. The syntax of using capitalize() function is:
string_name.capitalize()

Program 9: To use various string built-in functions

Program9.py Output

File Edit Format Run Options Window Help 5
hello
str = 'Hello'
HELLO
print(len(str))
Hello
print('Hello'.lower())
print('hello'.upper())
print('hello'.capitalize())

Topic Flashback 21 st Century
Skills #Information Literacy

1. What is a string?

2. What are escape sequences?

Functions and String in Python 133