Legacy PARAMETER statements (The GNU Fortran Compiler)

#### 5.1.32 Legacy `PARAMETER` statements ¶

For compatibility, GNU Fortran supports legacy `PARAMETER` statements without parentheses with `-std=legacy`. A warning is emitted if used with `-std=gnu`, and an error is acknowledged with a real Fortran standard flag (`-std=f95`, etc...). These statements take the following form:

    implicit real (E)
    parameter e = 2.718282
    real c
    parameter c = 3.0e8