Question

1. Write a Matlab program to store the first 4 perfect numbers in a row vector. Also create another column vector containing the same elements.

Answer 1

Create a MATLAB function called Perfect_numbers and then write the following code in it.

The code:

function Perfect_numbers()

i=2;c=0;x=0;

while(c<4)

s=0;

for d=1:i-1

if(rem(i,d)==0)

s=s+d;

end

end

if(s==i)

if(x==0)

x=i;

else

x=[x i];

end

c=c+1;

end

i=i+1;

end

y=x';

% The variable x stores the results in row vector form

% The variable y stores the results in column vector form

fprintf('\nFirst four perfect numbers in row vector: ');

fprintf('%d\t',x);

fprintf('\nFirst four perfect numbers in column vector:');

fprintf('\n%d',y);

end

On running the above code in the command window, the following output is generated :

First four perfect numbers in row vector: 6 28 496 8128
First four perfect numbers in column vector:
6
28
496
8128