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+//Example 1.19: add 7 to -5
+clc//clears the console
+clear //clears all existing variables
+x=bitcmp(5,4) //computes bit by bit complement of 5
+y=1;
+u=x+y //1 is added to the complement
+v=7;
+w=u+v
+a=dec2bin(w) //binary conversion of the decimal number
+disp(' binary form of the number obtained by adding 7 to -5 ')
+disp(a) //result is displayed
+disp(' the msb is discarded,so four bit representation in binary form =') 
+a=dec2bin(w-(2^4),4)
+disp(a) //final result is displayed.