SGN (Sign Value)
The SGN function is used to find the sign value of a number.
Syntax
SGN ( number )
Example
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.
'CR1000X Series 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