Fortran邏輯運算符

試試下面的例子就明白所有在Fortran語言可用的邏輯運算符：

program logicalOp ! this program checks logical operators implicit none ! variable declaration
logical :: a, b ! assigning values
a = .true. b = .false. if (a .and. b) then print *, "Line 1 - Condition is true" else print *, "Line 1 - Condition is false" end if if (a .or. b) then print *, "Line 2 - Condition is true" else print *, "Line 2 - Condition is false" end if ! changing values
a = .false. b = .true. if (.not.(a .and. b)) then print *, "Line 3 - Condition is true" else print *, "Line 3 - Condition is false" end if if (b .neqv. a) then print *, "Line 4 - Condition is true" else print *, "Line 4 - Condition is false" end if if (b .eqv. a) then print *, "Line 5 - Condition is true" else print *, "Line 5 - Condition is false" end if end program logicalOp

當編譯並執行上述程序,將產生以下結果：

Line 1 - Condition is false
Line 2 - Condition is true
Line 3 - Condition is true
Line 4 - Condition is true
Line 5 - Condition is false