Code for DFT without using built-in functions | MATLAB

Code:

clc

clear all

close all

x=input('Enter the sequence:');

n=input('Enter the time sample:');

N=input('Enter value greater than or equal to length(x)');

if(N>length(x))

    for i=1:N-length(x)

        x=[x 0];

    end

end

X=[];

xx=0;

for k=0:N-1

    for n=0:N-1

        xx=xx+x(n+1)* exp(-j*2*pi*n*k/N);

    end

    X=[X xx];

    xx=0;

end