Python 3 – Strings |
Strings in Python are identified as a contiguous set of characters represented in the quotation marks. Python allows either pair of single or double quotes.
Creating strings is as simple as assigning a value to a variable. For example
var1 = 'Hello World!'
var2 = "Python Programming"
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Subsets of strings can be taken using the slice operator ([ ] and [:]
) with indexes starting at 0 in the beginning of the string and working their
way from -1 to the end.
The plus (+) sign is the string concatenation operator and the
asterisk (*) is the repetition operator.
Accessing Values in Strings
Python does not support a character type; these are treated as strings of length one, thus also considered a substring.
To access substrings, use the square brackets for slicing along with the index or indices to obtain your substring. For example-
- Slice operators : [ ] and [:]
- Indexes : starts from 0 in forward direction, -1 in reverse direction.
- concatenation operator : +
- repetition operator : *
Example : let's take - Hello, World!
and one more example here -
and the output is :
Updating Strings
You can "update" an existing
string by (re)assigning a variable to another string. The new value can be
related to its previous value or to a completely different string altogether.
For example-
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#!/usr/bin/python3
var1
= 'Hello World!'
print
("Updated String :- ", var1[:6] + 'Python')
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it's Out put :
Updated
String :- Hello Python
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