## Why is this an issue?

Nested control flow statements `If`, `Select`, `For`, `For Each`, `While`, `Do`, and `Try` are often key ingredients in creating what’s known as "Spaghetti code". This code smell can make your program difficult to understand and maintain.

When numerous control structures are placed inside one another, the code becomes a tangled, complex web. This significantly reduces the code’s readability and maintainability, and it also complicates the testing process.

## How to fix it

### Code examples

The following example demonstrates the behavior of the rule with the default threshold of 3 levels of nesting:

#### Noncompliant code example

    If condition1 ' Compliant - depth = 1
      ' ...
      If condition2 ' Compliant - depth = 2
        ' ...
        For i = 0 to 10 ' Compliant - depth = 3, not exceeding the limit
          ' ...
          If condition4 ' Noncompliant - depth = 4
            If condition5 ' Depth = 5, exceeding the limit, but issues are only reported on depth = 4
              ' ...
            End If
            Return
          End If
        Next
      End If
    End If