Write a program that reads two words W1 and W2. W2 is at the beginning of W1. Print the index at which W2 ends in W1.
Answer (2)
To solve this problem, we need to write a program that checks where the second word (W2) ends in the first word (W1). Since W2 is given to be at the beginning of W1, our task is to find the ending index of W2 within W1.
Here's a simple step-by-step explanation:
Input the words : First, we should read two words (W1 and W2) from the user.
Check initial condition : Ensure that W2 is truly a prefix of W1. If not, there's an error in the input, as W2 needs to be at the start of W1.
Determine the ending index : The length of W2 can be used to find out where it ends in W1. Since computer indices start at zero, the ending index of W2 is actually the length of W2 minus one.
Here's a simple Python program implementing these steps:
Read inputs
W1 = input('Enter the first word (W1): ') W2 = input('Enter the second word (W2): ')
Check if W2 is at the beginning of W1
if W1.startswith(W2): # Calculate the ending index of W2 in W1 ending_index = len(W2) - 1 print(f'The index at which W2 ends in W1 is: {ending_index}') else: print('The second word is not at the beginning of the first word.') ;
To find the ending index of W2 in W1, we can use a Python program that checks if W2 is a prefix of W1 and then calculates the ending index by subtracting one from the length of W2. This ensures the program provides the correct zero-based index position. If W2 is not at the beginning of W1, the program informs the user accordingly.
;
