Question

What is wrong with the following code? Explain verbally.

s1 = "Canada"

s1[2] = ‘T’

What will the following code display? Explain verbally.

s1 = "Hawaii is a paradise"

print(s1[2:8])

Write puthon code using the in operator that determines whether ‘p’ is in s1.

Answer 1

Part -a) s1= "Canada"

             s1[2]= 'T'

             This will produce an error because strings in python are immutable i.e. you are not allowed to modify individual character of the existing string. You can just create a new string and make the changes. This is the thing which makes strings and other collections in python different from each other.

Part -b) s1 = "Hawaii is a paradise"

             print(s1[2:8])

            Output-

             waii i

             Basically, this notation s[m:n] return a sub-string of a string s starting from index m (s is a 0th indexing string) and ending at index n-1 i.e. index m is included and index n is not included.

Part -c) Write python code using the in operator that determines whether ‘p’ is in s1.

             'in' operator in python is a membership operator which returns True if a sequence with the specified value is present   in the object else it return False.

            Code -

             s1 = "Hawaii is a paradise"
             print ('p' in s1)

           Output -

            True