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--- syntax:functions:sign [2016/06/20 11:58] – dmitry
+++ syntax:functions:sign [2021/08/11 15:35] (current) – [Examples] craigt
@@ Line 1: / Line 1: @@
-===== Sign(number) =====
+====== Sign(number) ======
+Category:  Number function
-Sign of a number. The sign of a number is 1 when the number is positive, and  −1 when the number is negative. The number zero is neither positive nor negative, and therefore has no sign.
+\\
+=====Description=====
+This function determines whether //number// is positive, negative, or zero.  If positive the value 1 is returned.  If negative, the value -1 is returned.  If //number// is 0, then 0 is returned.
-^  Example  ^  Result  ^
+\\
-| sign(0 - 85)  |  -1 |
+=====Arguments=====
-| sign(0)  |  0 |
+^Argument^Type^Description^
-| sign(125.1231)  |  1 |
+|number|Number|The value being tested as positive, negative or zero.|
+\\
+**Return value type:**  Number (1, -1, or 0)
+\\
+=====Remarks=====
+An expression that results in a numeric answer can be used as the //number// argument.  In this case, the result of the expression is tested.
+\\
+=====Examples=====
+  sign(27) //Returns 1
+  sign(-42) //Returns -1
+  sign(0) //Returns 0
+  sign(14*-3) //Returns -1
+  sign(88 * 0) //Returns 0
+  sign(12 * 3) //Returns 1
-Note: keep in mind that EasyMorph doesn't support unary minus in expressions - see Example 1 above.