Fortran嵌套if結構

可以使用一個 if 或else if 在另一個if或else if語句中。

語法

嵌套if語句的語法如下：

if ( logical_expression 1) then !Executes when the boolean expression 1 is true … if(logical_expression 2)then ! Executes when the boolean expression 2 is true … end if end if

例子

program nestedIfProg implicit none ! local variable declaration
integer :: a = 100, b= 200 ! check the logical condition using if statement if( a == 100 ) then ! if condition is true then check the following if( b == 200 ) then ! if inner if condition is true print*, "Value of a is 100 and b is 200" end if end if print*, "exact value of a is ", a print*, "exact value of b is ", b end program nestedIfProg

當上述代碼被編譯和執行時，它產生了以下結果：

Value of a is 100 and b is 200 exact value of a is 100 exact value of b is 200