Question

Write a program to find the first and the last occurence of the letter 'o' and character ',' in "hello, world".

Answer 1

Answer:

Input : str = "geeks", x = 'e'

Output : 2

Last index of 'e' in "geeks" is: 2

Input : str = "Hello world!", x = 'o'

O is

: 7

Last index of 'o' is: 7

Answer 2

Answer:

n="Hello,World"

a=-1

x=-1

b=0

y=0

for i in n:

   a=a+1

   if i=='o' :

       break

print(a,"is the index of o from forward")

for i in n:

   x=x+1

   if i==',':

       break

print(x,"is the index of , from forward")

for i in reversed(n):

   b=b+1

   if i=='o':

       break

print(b,"is the index of o from backwards")

for i in reversed(n):

   y=y+1

   if i==',':

       break

print(y,"is the index of , from backwards")

Explanation:

firstly it check from forward and then from backwards

this is for python