Accessing Python String Items

M3-R5.1 · Chapter 5: Sequence Data Types · 3 min read

Accessing Python String Items:We can access individual characters in a string using indexing and extract multiple characters using slicing.

Individual characters in a string can be accessed by specifying the string name followed by a number in square brackets ( [] ). String indexing in Python is zero-based: the first character in the string has index 0 , the next has index 1 , and so on.

Example of Accessing Python String Items:

A=Jai Prakash Mishra”

#positive Index

print(a[0])

print(a[1])

print(a[2])

#Negaitve Index

print(a[-1])

print(a[-2])

print(a[-3])

Traversing a String: Traversing a string in Python means accessing each character in the string, one by one. This can be done using loops:

Example-1:

Using a for loop

name = "Naitik"

for char in name:

print(char)

Using for with range() and indexing

name = "Naitik"

for i in range(len(name)):

print(f"Character at index {i} is {name[i]}")

Using a while loop

name = "Naitik"

i = 0

while i < len(name):

print(name[i])

i += 1

Example-2:

str = “Karamraji”

for ch in str :

print(ch, end= ‘ ‘)

Output: Karamraji

str = "Karamraji"

for ch in str :

print(ch, end= "$ ")

Output: K$ a$ r$ a$ m$ r$ a$ j$ i$

str = "Karamraji"

for ch in str :

print(ch,"**", end= "$ ")

Output:

K **$ a **$ r **$ a **$ m **$ r **$ a **$ j **$ i **$

str = "Karamraji"

for ch in range (len(str)) :

print(ch, end= " ")

Output:

0 1 2 3 4 5 6 7 8

str = "Karamraji"

for ch in range (len(str)) :

print(str[ch], end= " ")

Output:

K a r a m r a j i

# Reverse a String

str="prakash"

for i in range(-1,-len(str)-1,-1):

print(str[i],end="")

Output: hsakarp

Q: Write a program to get the string from keyboard until user enter quit and Print the length of all entered string

while True:

str=input("plz enter the string")

if str=="quit":

break

print ("the length of string is ",len(str))

print("Done")

:OUTPUT:

plz enter the string jai

the length of string is 3

plz enter the string prakash

the length of string is 7

plz enter the string mishra

the length of string is 6

plz enter the string quit

Done