What's a numerical expression?

Question

What's a numerical expression?

Answer 1

A numeric expression resolves to a number, and you specify such an expression in various situations; for example, on the right side of an assignment statement. A numeric expression may be composed of any of these:

A numeric operand, which is one of these:

An item (or a system variable) that contains a number. The item may be preceded with a sign.

A numeric literal, which may begin with a sign, but always has a series of digits and may include a single, locale-specific decimal point.

A function invocation that returns a number.