Loop constructs are an important part of programming in the C language. They allow a program to repeat a set of instructions multiple times without writing the same code again and again. This makes programs shorter, more efficient, and easier to understand.
In this chapter, students learn how to use different types of loops such as while loop, do-while loop, and for loop. These loops help perform repetitive tasks like printing numbers, calculating sums, and processing large amounts of data. Understanding loop constructs is essential for writing effective and logical programs in C.
📥 Download Class 12 Computer Science Chapter 12 Loop Constructs Notes
📄 Chapter 12 – Loop Constructs Complete Notes
Skip to PDF contentYou can download the complete notes of Class 12 Computer Science Chapter 12 – Loop Constructs, including explanations of while loop, do-while loop, for loop, nested loops, break and continue statements, along with solved examples, short questions, long questions, and MCQs in PDF format.
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📝 Chapter 12 – Loop Constructs MCQs
1. Which loop executes its body at least once even if the condition is false?
(a) while loop
(b) for loop
(c) do-while loop ✅
(d) nested loop
2. Which loop is known as an entry-controlled loop?
(a) do-while loop
(b) while loop ✅
(c) switch statement
(d) continue statement
3. Which statement is used to terminate a loop immediately?
(a) continue
(b) break ✅
(c) stop
(d) return
4. A loop inside another loop is called:
(a) Infinite loop
(b) Conditional loop
(c) Nested loop ✅
(d) Sequential loop
5. Which loop is most suitable when the number of iterations is known?
(a) while loop
(b) do-while loop
(c) for loop ✅
(d) switch statement
❓ FAQs – Chapter 12 Loop Constructs
1. What are loop constructs in C language?
Loop constructs are programming structures used to repeat a set of instructions multiple times until a specific condition is met. They help reduce code repetition and make programs more efficient.
2. What are the main types of loops in C?
The main types of loops in C language are while loop, do-while loop, and for loop. Each loop is used depending on the situation and program requirements.
3. What is the difference between while loop and do-while loop?
The while loop checks the condition before executing the loop body, so it may not execute at all if the condition is false. The do-while loop checks the condition after executing the loop body, so it always runs at least once.
4. What is a nested loop in C?
A nested loop is a loop placed inside another loop. It is commonly used when a program needs to repeat a task within another repeating task, such as printing tables or patterns.