Circular Convolution in MATLAB

Just create a new file with extension .m and paste the code below in that .m file. Then Run it.

clear all;
clc;
x=input('enter the sequence x(n) : ');
h=input('enter the sequence h(n) : ');
l_x=length(x);
l_h=length(h);
l=max(l_x,l_h);
x=[x,zeros(1,l-l_x)];
h=[h,zeros(1,l-l_h)];
l1=length(x);
m1=length(h);
j=0;

for s=1:1:l1
    g(s)=0;
    j=j+1;
    for i=1:l1
        if j<1
            j=l1;
        end
        g(s)=g(s)+x(i)*h(j);
        %i=i+1;
        j=j-1;
    end
end
g
subplot(3,1,1);
stem(x);
xlabel('time');
ylabel('amplitude');
title('original signal x(n)');
subplot(3,1,2);
stem(h);
xlabel('time');
ylabel('amplitude');
title('original signal h(n)');
subplot(3,1,3);
stem(g);
xlabel('time');
ylabel('amplitude');
title('Circular Convoluted Signal');