Difference between revisions of "SGN"

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

Revision as of 19:17, 6 October 2009

The SGN function returns the sign of a number value.


Syntax: 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.

n = -100
IF SGN(n) = -1 THEN n = ABS(n)
PRINT n

Screen result: 100


See also: ABS, _DEFINE, _UNSIGNED, Mathematical Operations


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