Fortran Online Compiler

Write, Run & Share Fortran code online using OneCompiler's Fortran online compiler for free. It's one of the robust, feature-rich online compilers for Fortran language, running on the latest version 7. Getting started with the OneCompiler's Fortran compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Fortran and start coding.

Read inputs from stdin

OneCompiler's Fortran online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample Fortran program which takes name as input and prints hello message with your name.

About Fortran

Fortran language was initially developed for scientific calculations by IBM in 1957. It has a number of in-built functions to perform mathematical calculations and is ideal for applications which has more mathematical calculations.

Syntax help

Data Types

Data type	Description	Usage
Integer	To store integer variables	integer :: x
Real	To store float values	real :: x
Complex	To store complex numbers	complex :: x,y
Logical	To store boolean values True or false	logical :: x=.True. , logical :: x = .FALSE.
Character	To store characters and strings	character :: x

Variables

Variable is a name given to the storage area in order to manipulate them in our programs.

Arrays

Array is a collection of similar data which is stored in continuous memory addresses.

Syntax

Example

Loops

1. Do:

Do is used to execute a set of statement(s) iteratively when a given condition is true and the loop variable must be an integer.

2. Do-While:

Do-While is used to execute a set of statement(s) iteratively when a given condition is true.

3. If:

If is used to execute a set of statements based on a condition.

4. If-Else:

If is used to execute a set of statements based on a condition and execute another set of statements present in else block, if condition specified in If block fails.

5. Case:

Case is similar to switch in C language.