uygic

1. Nested Loops
Concept, Syntax & Examples

2. What is a Loop?
• • A loop repeats a block of code
• • Used to save time and reduce code
• • Examples: for, while, do-while

3. What is a Nested Loop?
• • A loop inside another loop
• • Inner loop runs completely for each outer loop iteration

4. Why Use Nested Loops?
• • Work with tables & matrices
• • Pattern printing
• • Multi-dimensional data

5. General Syntax
• for i = 1 to n
• for j = 1 to m
• statement
• next j
• next i

6. Execution Flow
• • Outer loop runs first
• • Inner loop runs fully
• • Repeats until outer loop ends

7. Example (C++)
• for(int i=1;i<=3;i++)
• {
• for(int j=1;j<=2;j++)
• cout << j;
• }

8. Output Explanation
• • Inner loop runs 2 times
• • Outer loop runs 3 times
• • Total output = 6 times

9. Advantages & Disadvantages
• Advantages:
• • Powerful & flexible
• Disadvantages:
• • More time complexity

10. Conclusion
• • Nested loops are essential
• • Used in real-world programming
• • Practice improves understanding