-index() is a python function which are used to find the index of element in the given string or list.
-index() take one element as a argument whose index are to be find in the sequence.
Example-
string is "mytext"
index of 't' is 2
list is [1,2,4,3,7,6]
index of 7 is 4
program-
print("Enter first string")
s1=input()
print("Enter any character")
s2=input()
print(s2,"is present in",s1,"at",s1.index(s2),"index")
l=[1,2,3,4]
print("Enter number to find in list")
n=int(input())
print(n,"is present at",l.index(n),"index")
Enter first string
helloworld
Enter any character
w
w is present in helloworld at 5 index
Enter number to find in list [1, 2, 3, 4]
4
4 is present at 3 index
Enter first string
this is the string
Enter any character
the
the is present in this is the string at 8 index
Enter number to find in list [1, 2, 3, 4]
1
1 is present at 0 index