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diff --git a/45/CH2/EX2.12/example_2_12.sce b/45/CH2/EX2.12/example_2_12.sce
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+//Example 2.12

+clc

+clear

+a=[0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1];

+b=[0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1];

+c=[0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1];

+d=[0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1];

+for i=1:16 // finding Y and y1 for all possible inpt cases 

+    x=bitand(a(i),b(i));

+    y=bitand(c(i),d(i));

+    r(i)=bitor(x,y);

+    x1=bitcmp(x,1);

+    y1=bitcmp(y,1);

+    z=bitand(x1,y1);

+    r1(i)=bitcmp(z,1);

+end

+disp('   Y    Y1');

+for i = 1 : 16 // displaying result

+        Y(i,1)=r(i);

+        Y(i,2)=r1(i);

+        end

+disp(Y);

+disp('Both are logically equivalent');