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  • Writer's pictureAdisorn O.

FORTRAN 95 Cheat Sheet

! Program Structure:

PROGRAM ProgramName

! Declarations and statements

CONTAINS

! Subroutines and functions

END PROGRAM ProgramName


! Variable Declaration:

INTEGER :: int_var

REAL :: real_var

DOUBLE PRECISION :: dbl_var

CHARACTER(LEN=20) :: char_var


! Arrays:

REAL, DIMENSION(3) :: real_array

INTEGER, DIMENSION(0:9) :: int_array


! Control Structures:

IF (condition) THEN

! code block

ELSE

! code block

END IF


DO i = start, stop, step

! code block

END DO


SELECT CASE (variable)

CASE (value1)

! code block

CASE (value2)

! code block

CASE DEFAULT

! code block

END SELECT


! Subroutines and Functions:

SUBROUTINE MySubroutine(arg1, arg2)

! code block

END SUBROUTINE


FUNCTION MyFunction(arg1, arg2) RESULT(result_var)

! code block

END FUNCTION


! Modules:

MODULE MyModule

! Declarations

CONTAINS

! Subroutines and functions

END MODULE MyModule


! File I/O:

OPEN(unit=unit_num, file='filename', status='STATUS')

READ(unit_num, *) variable

WRITE(unit_num, *) variable

CLOSE(unit_num)


! Parameter Statements:

PARAMETER (pi = 3.14159)


! Derived Types:

TYPE MyType

INTEGER :: x

REAL :: y

END TYPE MyType


TYPE(MyType) :: obj


! Pointer Variables:

REAL, POINTER :: ptr_var(:)

ALLOCATE(ptr_var(10))


! Intrinsic Functions:

result = SIN(angle)

result = SQRT(value)

result = MAX(val1, val2)


! Array Operations:

real_array = real_array1 + real_array2

real_array = real_array * 2.0


! Format Statements:

WRITE(*, '(A, I3, F5.2)') 'Result:', int_var, real_var


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