"Undefined function or variable 'y'"

Here is my code.

x = 1:100 (Creating a vector from 1-100)

if rem(x,2) == 0 (looking for even numbers)

     y = x

end
y

Why is it telling me that y is undefined. It's essentially skipping over my if statement

Answer 1

[Bob Thompson]

It's occurring because for your first number, x = 1, the if statement returns false, and so no value for y is defined, but then it's trying to display a value of y that doesn't exist. I would suggest setting y = 0 initially.

Answer 2

[amin ya]

If your condition doesn't hold true., it will skip your if, and it will give an error when you recall y.

You can get the output of y by not puting ";" in front of the y=x. You can also use "else"

if rem(x,2) == 0 (looking for even numbers)

       y = x
  else
       y='not defined'
  end