About scope

If you check the scope, it will be a range, so it is a variable with a valid range. For example


for(int x = 0; x < 10; x++){

}

With this for statement for{ }

int x is only valid in this for statement.


for(int x = 0; x < 10; x++){

}

x = 3;

Will result in an error.

int x = 0

for(; x < 10; x++){

}

x = 3;

If you write it outside for {} like this, you can use it even if you exit for.


for(; x < 10; x++){

}

The for statement has been omitted, but I think it will be summarized someday.

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