Differences

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+====== arithmetic operators ======
+* (multiplicator) \\
+/ (dividing) \\
+% (modulo) ... e.g. rest of a number\\
++ -\\
+++ --\\
+==== example ====
+<code c>
+#include <stdio.h>
+int main (void) {
+int x,y;
+x=2;
+x = x+1; // = 3
+x = x++; // = 3
+x = ++x; // = 3
+x = +=x; // = 4
+// and so on
+/*
+for the wired case of
+x = x+++x;
+or
+x=x---x;
+that means
+x = x++ +x;
+and
+x = x-- -x;
+also possible is
+x = x- --x;
+*/
+}
+</code>

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