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FORTRAN language is the abbreviation of Formula Translation, which means "formula translation". It is designed for problems in science, engineering or enterprise management that can be expressed with mathematical formulas, and its numerical calculation function is strong.
FORTRAN language is the first high-level language in the world to be officially promoted and used. It was proposed in 1954 and officially used in 1956. It has a history of sixty years until 2014, but it still endures. It has always been the main language used in the field of numerical calculations.
Fortran program is a collection of program units, such as a main program, modules and external subprograms or programs.
Each program consists of a main program and may or may not contain other program units. The syntax of the main program is as follows:
program program_name implicit none ! type declaration statements ! executable statements end program program_name
A simple Fortran program
Let us write a program that adds two numbers and prints the result:
program addNumbers ! This simple program adds two numbers implicit none ! Type declarations real :: a, b, result ! Executable statements a = 12.0 b = 15.0 result = a + b print *, 'The total is ', result end program addNumbers
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