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diff --git a/3812/CH1/EX1.36.f/1_36_f.sce b/3812/CH1/EX1.36.f/1_36_f.sce
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+//Example 1.36<f>
+//Find whether the given signal is causal or not y(n)=x(n^2).
+clear all;
+clc;	
+n=-10:10;
+for i=1:length (n)
+x(i)=i;
+y(i)=(i.^2) ;
+end
+causal=%t;
+for i=1: length (n)
+if n(i)<0 &y(i)~=0 then
+causal=%f;
+end
+end
+disp(causal,"The statement that the system is causal is:");