It stated that the book "cannot be used as a valid expression of Catholic teaching, either in counseling and formation, or in ecumenical and interreligious dialogue."

If the type of ' and the type of are the same and assignment is allowed for that type, then this is a valid expression.

In C and most C-derived languages, a call to a function with a void return type is a valid expression, of type void.

The Bauhaus taught that divisions between art and craft were illusory, and both were equally valid artistic expressions.

The boolean expression must be a compile-time constant value, for example would be a valid expression in that context.

One can generate all of the valid expressions in the language generated by this grammar at a Prolog interpreter by typing .

Strings of symbols that violate the rules of syntax are not well-formed and are not valid mathematical expressions.

Being an expression is a syntactic concept; although different mathematical fields have different notions of valid expressions, the values associated to variables does not play a role.

For example, the following formulae could be valid expressions for some energy:

Christians, it seems, constantly ponder whether the excess of the season, its tinsel and commerce, isn't somehow a valid expression of the religious event.