Unused local variableDRT-W1698

The analyzer produces this diagnostic when a local variable is declared but never read, even if it's written in one or more places.

Example

The following code produces this diagnostic because the value of count is never read:

void main() {
  int count = 0;
}

Common fixes

If the variable isn't needed, then remove it.

If the variable was intended to be used, then add the missing code.