Is one variable in nested loop alright?

[jasonrobertz357]

for(unsigned short int i = 1; i <= 10; i++)
{
    for(unsigned short int i = 1; i <= 10; i++)
    {
        cout << 0;
    }
    cout << endl;
}

First, the variable in the nested loop was j and after I changed it to i, it works too.

[KurtJD]

Just because you can doesn't mean you should. Once you started using the variable i in the code it would be extremely confusing to anyone reading it.

[vlad from moscow]

According to the C++ Standard

A name introduced by a declaration in a condition (either introduced by the type-specifier-seq or the declarator of the condition) is in scope from its point of declaration until the end of the substatements controlled by the condition. If the name is re-declared in the outermost block of a substatement controlled by the condition, the declaration that re-declares the name is ill-formed

For example a C# compiler will issue a compilation error in such a situation.
So it is better do not do such a way.