The data types defined by ANSI FORTRAN 77 are as follows:
The data type of a variable, symbolic constant, or function can be declared in a specification statement. If its type is not declared, the compiler determines a data type by the first letter of the variable, constant, or function name. A type statement can also dimension an array variable.
Default requirements for these data types are listed in the following table:
| Type | Bytes |
|---|---|
| INTEGER | 4 |
| REAL | 4 |
| DOUBLE PRECISION | 8 |
| COMPLEX | 8 |
| LOGICAL | 4 |
| CHARACTER | 1 |
| CHARACTER*n | n 1 |
| 1 Where the maximum n is 32,767. | |