Give an example of a function which is continuous but not differentiable at a point.

Explanation

To provide a step-by-step text solution to the question, we will define a function that is continuous but not differentiable at a specific point, and then we will explain why it meets the criteria.

### Step-by-Step Solution:

**Step 1: Identify a suitable function.**
We need to find a function that is continuous at all points but not differentiable at a certain point. A well-known example of such a function is \( f(x) = |x| \).

**Step 2: Analyze the function.**
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