O'Reilly logo

VB.NET Language in a Nutshell, Second Edition by Steven Roman PhD, Paul Lomax, Ron Petrusha

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Name

Sign Function

Class

System.Math

Syntax

Sign(value)
value (required; any numeric type, including Decimal)

A numeric expression

Return Value

Integer

Description

Determines the sign of a number

Rules at a Glance

The return value of the Sign function is determined by the sign of value, as follows:

If number is

Sign returns

Positive

1

Zero

0

Negative

-1

Programming Tips and Gotchas

  • Sign is useful in cases in which the sign of a quantity defines the sign of an expression. For example:

    lngResult = lngQty * Sgn(lngValue)
  • This is a Shared member, so it can be used without creating any objects.

  • If you are using the Sign function to evaluate a result to False (0) or True (any nonzero value), you could use the CBool function instead.

  • A major use for Sign is to determine the sign of an expression.

VB.NET/VB 6 Differences

The name of this function has changed. In VB 6, it is named Sgn. In VB.NET, it is named Sign and is a member of the Math class of the System namespace.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required