SGN (Sign Value)

The SGN function is used to find the sign value of a number.

Syntax

SGN ( number )

The example uses SGN to determine the sign of a number. A value is entered by the user in the variable UserEntry. The value stored in the Msg variable will indicate the sign of the entry.

'CR6 Datalogger

Public Msg,UserEntry      'Declare variables
Dim Number

BeginProg
  Scan (1,Sec,3,0)
    Number = UserEntry  'Get user input
    Select Case SGN( Number )  'Evaluate Number
    Case 0              'Zero
      Msg = 0
    Case 1              'Positive
      Msg = 1
    Case -1             'Negative
      Msg = -1
    EndSelect
  NextScan
EndProg

Remarks

The SGN function returns an integer indicating the sign of a number.

The Number argument can be any valid numeric expression. The sign of Number argument determines the value returned by the SGN function.

If X > 0, then SGN( X ) = 1

If X = 0, then SGN( X ) = 0

If X < 0, then SGN( X ) = -1