SGN - QB64 Wiki


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The SGN function returns the sign of a number value.


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


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