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+//                 Example 4.3       
+// A program that reads a character from the keyboard and then print in reverse
+//case ,that is,if input is in upper case,the output will be lower case and vice-versa 
+disp("Enter an alphabet");
+alphabet=scanf("%c");                  //Reading character
+if((ascii(alphabet))>=97) then
+    disp(convstr(alphabet,"u"));      //Reverse and display
+else
+    disp(convstr(alphabet,"l"));      //Reverse and display
+end