The '''SGN''' function returns the sign of a number value.



{{PageSyntax}}
:: sign% = SGN(value)



* Returns -1 when a sign is negative, 0 when a value is zero or 1 when a value is positive.
* Used to hold the original sign of a number.
* '''QB64''' allows programs to return only [[_UNSIGNED]] variable values using a [[_DEFINE]] statement.



''Example:'' Checking and changing negative values to positive ones.
{{CodeStart}}
n = -100
{{Cl|IF...THEN|IF}} {{Cl|SGN}}(n) = -1 THEN n = {{Cl|ABS}}(n)
PRINT n '' ''
{{CodeEnd}}
{{OutputStart}} 100
{{OutputEnd}}


''See also:'' 
* [[ABS]]
* [[_DEFINE]], [[_UNSIGNED]] 
* [[Mathematical Operations]]


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