dec

Decrements a number.

Syntax

• dec(x[, n])

  • x is a variable containing a number

  • n is an integer

Description

If x is a variable that is currently containing a number (which includes integers, rational numbers, real numbers, and complex numbers), then dec(x, n) decreases the value of x by n; hence, its new value becomes x − n. This value is also returned by the dec function. If omitted, n will be set to 1.

Technically, x must be an lvalue of type number. It can be a variable or a subscript or member of an object container variable.

See also

• pred

• inc