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--- non-integer_20modulo_20operation [2018/03/31 13:19] – external edit 127.0.0.1
+++ non-integer_20modulo_20operation [2024/01/05 00:21] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 =====Non-integer modulo operation=====
-//by Richard Russell, November 2011//\\ \\  BBC BASIC, in common with several other languages (e.g. C), provides only an integer [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin6.html#mod|MOD]] operator as standard. That is, you can pass non-integer values to MOD but they will be truncated to integers before the operation is carried out. For example:\\
+//by Richard Russell, November 2011//
+BBC BASIC, in common with several other languages (e.g. C), provides only an integer [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin6.html#mod|MOD]] operator as standard. That is, you can pass non-integer values to MOD but they will be truncated to integers before the operation is carried out. For example:
+<code bb4w>
         PRINT 678.9 MOD 123.45
-prints the value **63**.\\ \\  However the [[http://en.wikipedia.org/wiki/Modulo_operation|modulo]] operation is not fundamentally limited to integer values and occasionally it can be useful to have a version which will work with non-integers. In C this is provided by the **fmod** library function. An equivalent function in BBC BASIC can be implemented as follows:\\
+</code>
+prints the value **63**.
+However the [[http://en.wikipedia.org/wiki/Modulo_operation|modulo]] operation is not fundamentally limited to integer values and occasionally it can be useful to have a version which will work with non-integers. In C this is provided by the **fmod** library function. An equivalent function in BBC BASIC can be implemented as follows:
+<code bb4w>
         DEF FNfmod(x,y) = x - x DIV y * y
-Now we can perform the following operation:\\
+</code>
+Now we can perform the following operation:
+<code bb4w>
         PRINT FNfmod(678.9, 123.45)
-and the value printed is **61.65**.\\ \\  The **FNfmod** function listed above is restricted to values in the range -2147483648 to +2147483647 because of the use of the **DIV** operator. If you need an extended range (assuming *FLOAT64 mode is in use) the following function may be used:\\ \\
+</code>
-        DEF FNfmod(x,y) = x - SGNx * INT ABS(x/y) * ABSy
+and the value printed is **61.65**.