A command used to add, subtract, multiply, and divide two numbers. Numeric expressions are constructed using the numeric operators-- + (add), - (subtract), * (multiply), and / (divide).

A numeric constant, a simple numeric variable, a scalar reference to a numeric array, a numeric-valued function reference, or a sequence of the above, separated by numeric operators and parentheses.

a combination of numeric identifiers, numeric constants, function values, parentheses, arithmetic and unary operators, and conditional expressions yielding one or more numeric values

a number or a complex expressions that contains numbers, debug objects, or operands

An expression whose value is a number. Compare to string expression.

Any expression that can be evaluated as a number. Elements of the expression can include any combination of keywords, variables, constants, and operators that result in a number.

A numeric constant, variable, or function value, or combination of these, joined by numeric operators and parentheses, so that the entire expression can be evaluated to produce a single numeric value. For example, -L or X+(Y-4.5*Z).

Any combination of words, variables, constants, and/or operators that result in a number; also known as an arithmetic expression.