ans answer

## Description

`ans` means "answer". Variable `ans` is created automatically when expressions are not assigned. `ans` contains the last unassigned evaluated expression.

Variable `ans` is not protected by `predef`.

## Examples

    2+2
    ans // 4
    ans=10 // 10
    clear ans
    a=2+2;
    isdef("ans") // F

## See also

- predef