Why is my own echelon function printing incorrect matrix

I am trying to create an echelon function, however, I am having trouble debugging my error. It works for almost all matrices but for the following matrix it gives an incorrect result:

A=[1 2 3 ; 1 2 4 ; 1 2 4]
echelon(A)
function x = echelon(A)
[m,n]= (size(A)); % m= rows , %n= columns
j=1;
i=1;
    while( i

It gives the following incorrect result:

1 2 3

0 0 1

0 0 1

Also for the following matrix:

A=[1 2 3 ; 1 2 5]

gives the following incorrect result:

1 2 3

0 0 2

NOTE:-

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I haven’t checked all of your code, but I assume this:

if ~all(A(k,:))==0 %check to see if row of zeros or not

was meant to be this instead:

if ~all(A(k,:)==0) %check to see if row of zeros or not

Also, you divide by A(i,j) before checking to see if it is 0.

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Why is my own echelon function printing incorrect matrix

Why is my own echelon function printing incorrect matrix