# V3030\. Recurring check\. This condition was already verified in previous line\.

The analyzer has detected a possible error that has to do with one and the same condition being checked twice\.

Consider the following two examples:

```cpp
// Example N1:
if (A == B)
{
  if (A == B)
    ....
}

// Example N2:
if (A == B) {
} else {
  if (A == B)
    ....
}
```

The second "if \(A \=\= B\)" condition is always true in the first case and always false in the second\.

This code is very likely to contain an error – for example a wrong variable name is used because of a typo\. Correct versions of the examples above should look like this:

```cpp
// Example N1:
if (A == B)
{
  if (A == C)
    ....
}

// Example N2:
if (A == B) {
} else {
  if (A == C)
    ....
}
```