qb64/internal/help/SGN.md

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.
• Function is used to store the original sign of a number.
• QB64 allows programs to return only _UNSIGNED variable values using a _DEFINE statement.

Example(s)

Checking and changing negative values to positive ones.

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

 100

See Also

• ABS
• _DEFINE, _UNSIGNED
• Mathematical Operations