Ip Sumita Arora Class 12 -

He turned to . Sumita Ma'am's table compared Stack vs Queue with real-life examples: "Plates in a cafeteria" for LIFO. He coded push() and pop() in 15 minutes.

Meera didn't pick up the book. Instead, she picked up a marker and drew a big box on his whiteboard. "This is your main program." Then she drew a smaller box inside. "This is your function." ip sumita arora class 12

He wrote the code smoothly. No syntax errors. No logical flaws. He turned to

Write a program to check if a string is a palindrome. Meera didn't pick up the book

Rohan pointed to the dog-eared, coffee-stained on his shelf.

"Sumita Arora explains it with a chit system on page 187," she said. "A local variable is like a chit passed inside the small box. You can't use it outside. A global variable is like a chit on the main notice board. Everyone sees it."

"I don't get scope ," Rohan groaned. "Global, local—it's just confusing. And stacks? Don't even start."