C Array Loop

C Array Loop (Beginner → Advanced)

In C language, an array loop means using loops (mostly for, sometimes while) to traverse, read, update, or process array elements.
This is a core concept for DSA, problem-solving, and interviews.

Why Do We Need Loops with Arrays?

Arrays store multiple values
Loops help access each element easily
Avoids repetitive code
Essential for searching, sorting, counting, etc.

Basic Array Loop Using `for`

Output:

Taking Array Input Using Loop

Very common in exams & interviews

Array Loop Using `while`

Useful when loop count is dynamic

Reverse Array Using Loop

Output:

Sum of Array Elements

Used in statistics & analytics

Find Maximum Element in Array

Interview favorite

Count Even & Odd Numbers

Used in logical problems

Array Loop with Pointer (Advanced)

Uses pointer arithmetic

Nested Loop with 2D Array

Used in matrix operations

Common Mistakes

Using wrong loop condition
Accessing out-of-bounds index
Hardcoding size incorrectly
Forgetting increment/decrement

Best practice:

Interview Questions (Must Prepare)

How to traverse an array in C?
Difference between for and while for arrays?
How to find max/min using loop?
What happens if index exceeds array size?
Can we use pointer instead of index?

Summary

Loops are essential to work with arrays
for loop is most commonly used
Can read, print, modify, and analyze arrays
Foundation for DSA & interview problems