ReferenceExcel FormulasSupported FormulasSIGNOn this pageSIGN The SIGN function returns the sign of a number: 1 if positive, 0 if zero, or -1 if negative. Syntax =SIGN(number) Parameters number: The number for which you want to determine the sign Examples =SIGN(10) // Returns 1=SIGN(-5) // Returns -1=SIGN(0) // Returns 0