### F77_TRUE

The logical value TRUE

#### Description:

Expand to the number that FORTRAN treats as
a logical value of TRUE.

#### Invocation

F77_TRUE

#### Examples:

F77_TRUE

will expand as
follows:
Solaris: | `1` |

OSF/1: | `-1` |

VAX/VMS: | `-1` |

#### Notes:

FORTRAN and C might not interpret the same numerical value as the same logical value.