Inputs and Outputs Basics

Take Input From User

input()

allows flexibility to take the input from the user. Reads a line of input as a string.

Code

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username = input()

print(username)

PYTHON

Input

Ajay

Output

Ajay

Working with Strings

String Concatenation

Joining strings together is called string concatenation.

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a = "Hello" + " " + "World"

print(a)

PYTHON

Output

Hello World

Concatenation Errors

String Concatenation is possible only with strings.

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a = "*" + 10

print(a)

PYTHON

Output

File "main.py", line 1

a = "*" + 10

^

TypeError:

can only concatenate str (not "int") to str

String Repetition

*

operator is used for repeating strings any number of times as required.

Code

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a = "*" * 10

print(a)

PYTHON

Output

**********

Code

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s = "Python"

s = ("* " * 3) + s + (" *" * 3)

print(s)

PYTHON

Output

* * * Python * * *

Length of String

len()

returns the number of characters in a given string.

Code

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username = input()

length = len(username)

print(length)

PYTHON

Input

Ravi

Output

4

String Indexing

We can access an individual character in a string using their positions (which start from 0) . These positions are also called as index.

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username = "Ravi"

first_letter = username[0]

print(first_letter)

PYTHON

Output

R

IndexError

Attempting to use an index that is too large will result in an error:

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username = "Ravi"

print(username[4])

PYTHON

Output

IndexError: string index out of range