The SIGN function returns +1, 0, or -1 depending on the sign of the argument. 
 
   
	 The type of the function is integer. 
	 
 
   
 
  General Format 
 
	  
	  
 
  Arguments 
 
	   
	 - Argument-1 must be class numeric. 
	 
Returned Values 
 
	   
	 - The returned value is: 
		 
		  - When the value of argument-1 is positive, 1 
		  
- When the value of argument-1 is zero, 0 
		  
- When the value of argument-1 is negative, -1