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+{{keywords>wiki library source code example reference}}
+===== fmod =====
+<code c>
+    double fmod(double, double );
+</code>
+returns the remainder of a statement
+===== C Sourcecode Example =====
+compile in linux with: gcc fmod.c -o fmod **-lm** -Wall
+<code c>
+#include <stdio.h> /* including standard library */
+//#include <windows.h> /* uncomment this for Windows */
+#include <math.h> /* including math library */
+int main ( void )
+{
+double y,x;
+x = 9;
+y = 4.2;
+printf("rest of %f / %f is %f\n", x, y, fmod(x,y) );
+return 0;
+}
+</code>
+==== output ====
+   output:
+   user@host:~$ ./fmod
+   rest of 9.000000 / 4.200000 is 0.600000

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