Palindrome using Stack | Stack and Queue | Data Structure Using C

TL;DR

This video demonstrates how to use a stack data structure to check if a string entered by the user is a palindrome or not.

Transcript

hello dear students i welcome all of you to this video in which we will see application of stack we are going to check whether the given string entered by the user is palindrome or not now palindrome as you all know are the strings which read from left or right remain the same for example madam this string if read from left or if read from right th... Read More

Key Insights

• 🫠 Palindromes are strings that read the same forward and backward.
• ◀️ Using a stack, we can easily reverse a string.
• ✅ The reversed string can be compared with the original to check for palindromes.
• ↩️ The strlen function is used to compare strings and returns zero if they are equal.
• ❤️‍🩹 The backslash zero is added to the reverse array to mark the end of the string.
• 🫷 The implementation involves defining a stack data structure with push, pop, and empty functions.
• 👤 The original string is obtained from the user using the get as function.
• 📚 The library function strcmp is used to compare the original and reverse strings.

Questions & Answers

Q: What is a palindrome?

A palindrome is a string that remains the same when read forward and backward, such as "madam" or "nitin".

Q: How does the stack help in checking for palindromes?

The stack is used to reverse the original string entered by the user. By pushing each character onto the stack and then popping them in reverse order, we obtain the reversed string.

Q: What does the backslash zero represent in the string?

The backslash zero is a null character that marks the end of the string. It is intentionally pushed into the reverse array to ensure that it is complete.

Q: How do we determine if a string is a palindrome?

After obtaining the reversed string, we compare it with the original using the strlen function. If the strlen function returns zero, it means the strings are equal and the original string is a palindrome.

Summary & Key Takeaways

• Palindromes are strings that read the same forward and backward.

• The video explains how to use a stack to reverse the original string entered by the user.

• By comparing the reversed string with the original using the strlen function, we can determine if the string is a palindrome.