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Task/Fibonacci-sequence/ERRE/fibonacci-sequence.erre

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+!-------------------------------------------
+! derived from my book "PROGRAMMARE IN ERRE"
+! iterative solution
+!-------------------------------------------
+
+PROGRAM FIBONACCI
+
+!$DOUBLE
+
+!VAR F1#,F2#,TEMP#,COUNT%,N%
+
+BEGIN    !main
+   INPUT("Number",N%)
+   F1=0
+   F2=1
+   REPEAT
+      TEMP=F2
+      F2=F1+F2
+      F1=TEMP
+      COUNT%=COUNT%+1
+   UNTIL COUNT%=N%
+   PRINT("FIB(";N%;")=";F2)
+
+   ! Obviously a FOR loop or a WHILE loop can
+   ! be used to solve this problem
+
+END PROGRAM