[Solved] Can’t use nested variable

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To use the variable outside the block you need to declare it outside the block.

As the variable has to have a value even if you don’t run the code in the block, you either have to set an initial value:

string test = null;
if (condition) {
  test = "success";
}

or use an else block to set a value otherwise:

string test;
if (condition) {
  test = "success";
} else {
  test = null;
}

solved Can’t use nested variable