Sgn

Return an indicator of the numerical sign of a number.

Syntax

Sgn(x)

Arguments

• x

  Must be an integer or real number

Returns

-1 if x < 0; 0 if x = 0; 1 if x > 0

Exceptions

If x is not an integer or real number, returns an error value

Example

• Sgn(1.1)

  [Returns 1]

• Sgn(0)

  [Returns 0]

• Sgn(-0.1)

  [Returns -1]

• Sgn('att1')

  [Returns 1 if the value of 'att1' is positive, 0 if it equals 0, and -1 if it is negative]