Python Strings

Python Strings

A string is usually a bit of text in programming that is written to be displayed to users. It is known to Python when you want to display a string. This is because programmers use either double quote “ or single quote ‘ to enclose a word or group of words to express a string.

Example:

#!/usr/bin/python

ch = 'HelloPython'

str1 = "String Chapter"

Accessing String Values

Characters are not supported by Python which makes it simpler as characters in Python are treated as strings of length 1 and hence considered as a sub-string.

Program showing the use of strings and how they are displayed on-screen.

Example:

#!/usr/bin/python

ch = 'Hello Python'

str1 = "String Chapter"

print ("First value is: " ,  ch)

print ("Second value is: " ,  str1)

Output:

First value is: Hello Python
Second value is: String Chapter

If they are considered as a list of characters, then the example shown below will let you understand how they are treated individually:

Example:

#!/usr/bin/python

ch = "Hello Python"

str1 = "String Chapter"

print ("First single sub-string is: " ,  ch[0])

print ("Set of sub-string is: " ,  str1[2:6])

Output:

First single sub-string is: H
Set of sub-string is: ring C

Updating a String Value or Variable

Reassigning the existing string-variable is simpler in Python. Just we have to use + operator along with the sub-string location. Let’s show this with an example:

Example:

#!/usr/bin/python

ch = "Hello Python"

print ("UPDATED STRING WILL BE: " , ch [:8]+ "Python")

Output:

UPDATED STRING WILL BE: Hello PyPython

Escape Characters

These are special characters represented by backslash followed by character(s) and they are used for special purposes. They can be interpreted using both single and double quote. The lists of Escape Characters in Python are:

• \a: alert
• \b: backspace
• \cx: Control X
• \e: escape
• \f: Form feed
• \n: New line or next line
• \r: carriage return
• \s: space
• \t: tab
• \v: Vertical Tab

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