= |
An assignment statement. Its left-hand-side must be a name of a variable, and its right-hand-side must be a value (constant, variable name, or an expression). |
call sub(list) |
Invoke the subroutine sub and exchange with it the values of all parameters appearing in the list |
character*n var |
Allocate n bytes in memory to hold the character (string) value of var.
n is a literal constant and can be any positive integer. If this statement appears in a subprogram in which var is a parameter, you can replace n by (*) to indicate that its value is specified in the calling unit. |
close (unit = u) |
Close this unit and de-associate it with its file |
do, do while, end do |
An iteration structure |
end |
Indicate that the preceding program unit (main, subroutine, or function) has ended. |
exit |
Abort the surrounding loop |
f format (list) |
Specify a format whose number is f and which contains the indicated list of values and / or edit descriptors |
fun(list) |
Invoke the function fun sending to it the values of all parameters appearing in the list and receiving from it one value (being its name) |
if, else if, else, end if |
A selection structure |
implicit none |
Specify that all variables must be explicitly declared |
integer*n var |
Allocate n bytes in memory to hold the integer value of var. n is a literal constant and can be 1, 2, or 4 |
logical*1 var |
Allocate one byte in memory to hold the logical value of var. This value can be either .true. or .false. |
open (unit=u, file='f') |
Open the file f and associate it with unit number u (an integer) |
parameter (var=val) |
Indicate that var (declared in a previous statement) is a symbolic constant, and that its value will always be val |
print*, list |
Output the list of values on the screen w/o formatting |
program prog |
Indicate the start of the main program whose name is prog |
read(a,b) list |
Read the list of values from device a using the format statement b. If a is *, input is from the keyboard, and if b is *, input is unformatted. |
read*, list |
Read the list of values from the keyboard w/o formatting |
real*n var |
Allocate n bytes in memory to hold the real value of var. n is a literal constant and can be 4 or 8 |
rewind (unit = u) |
Reset the logical file pointer of this unit to the first record |
subroutine sub(list) |
Indicate the start of a subroutine whose name is sub. |
type function fun(list) |
Indicate the start of a function of the stated type and name fun |
write(a,b) list |
Output the list of values on device a using the format statement b. If a is *, output is on the screen, and if b is *, output is unformatted. |