6.5. Returning

Sometimes you don’t want to return the last thing calculated. You may, for example, want to return from a middle of a function. In this case, you can use the return keyword. return takes one argument, which is the value to be returned.

Example:

function f(x) = (
  y=1;
  while true do (
    if x>50 then return y;
    y=y+1;
    x=x+1
  )
)