Undefined function or variable

I got error as stated below, your assistance would be greatly appreciated, Thank you

A=3e3;

B=2e3;

while (abs(A-B))<50

x=4*A;

y=B*A*3;

end

x

y

****** Undefined function or variable 'x'.

Error in ddff (line 7) x

********

Answer 1

[Mischa Kim]

UTS, with those values for A and B you never enter the loop and therefore no values are assigned to x, which is why it is not defined.

One thing you could do is initialize x and y to zero before the loop.

[UTS]

Thank you very much, I did the initial values of x & y to zero, but the answer also zero, A=3e3;

B=2e3;

x=0;

y=0;

while (abs(A-B))<50

x=4*A;

y=B*A*3;

end

x

y

*************

x =

     0

y =

     0

[Mischa Kim]

Right, as I pointed out above, with A = 3000 and B = 2000 you never enter the loop, since 3000 - 2000 > 50. Try for example A = B = 3000. Note, however, that you are neither changing A nor B inside the loop. This means that the loop condition is always satisfied and you're stuck in an endless loop.