3.1 Source Form
6. Always use free source form.
Fortran 90 introduced free source form. We recommend that it always be used in new code. Free source form offers a number of advantages over the older fixed source form code:
- Free source form is more compatible with modern interactive input devices than fixed form. The maximum line length is 132 characters, compared to the older limit of 72 characters. This reduces the possibility of text exceeding the limit, which could lead the compiler to misinterpret names.
- Line continuations in free form are performed by using a trailing ampersand character, &, rather than entering a character in column 6 of the following line. As an additional visual reminder and safeguard, a leading ...