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+//EXAMPLE 2.33 ,stability of finite impulse response.
+//h[i]=impulse response of LTI system.
+clear;
+clc;
+n= -5:1/100:5;
+a= input('value of a');
+N1=input('lower limit');
+N2=input('upper limit');
+for i=1:length(a)
+    if (n(i)<N1 & n(i)>N2)
+        h(i)=0;
+    else
+        h(i)=a^n(i);
+        S=sum(h);
+    end
+end
+
+if(S<%inf)
+    disp('BIBO stable system');       //as long as N1,N2!=%inf 
+else
+    disp('BIBO unstable system');
+    
+end