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https://jennychen9827sbu.github.io/CAD281/array.html

What Is an Array in C?

Imagine a row of boxes. Each box stores a value. The whole row has one name — that’s an array. Each box also has a number label called an index so we can grab or update what's inside.

Let’s walk through this step by step.

Integer Array

int nums[4] = {10, 20, 30, 40};

This means:

• We created 4 integer boxes called nums.
• The values {10, 20, 30, 40} go into those boxes in order.

So:

• nums[0] → 10
• nums[1] → 20
• nums[2] → 30
• nums[3] → 40

💡 In C, array indexing starts at 0, not 1.