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Online Fortran to C Converter

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You can also type the input code below.

How to use this tool?

This free online converter lets you convert code from Fortran to C in a click of a button. To use this converter, take the following steps -

  1. Type or paste your Fortran code in the input box.
  2. Click the convert button.
  3. The resulting C code from the conversion will be displayed in the output box.

Examples

The following are examples of code conversion from Fortran to C using this converter. Note that you may not always get the same code since it is generated by an AI language model which is not 100% deterministic and gets updated from time to time.

Example 1 - Is String Palindrome

Program that checks if a string is a palindrome or not.

Fortran

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C

Example 2 - Even or Odd

A well commented function to check if a number if odd or even.

Fortran

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C

Key differences between Fortran and C

CharacteristicFortranC
SyntaxFortran has a simpler syntax compared to C.C has a more complex syntax compared to Fortran.
ParadigmFortran is primarily a procedural programming language, but it also supports object-oriented programming.C is a procedural programming language, but it also supports some object-oriented programming concepts.
TypingFortran is a statically typed language.C is a statically typed language.
PerformanceFortran is known for its high performance in scientific and engineering applications.C is also known for its high performance and is often used in system programming and embedded systems.
Libraries and frameworksFortran has a wide range of libraries and frameworks for scientific and engineering applications.C has a large number of libraries and frameworks for system programming, web development, and other applications.
Community and supportFortran has a smaller community compared to C, but it still has active support and development.C has a large and active community with extensive support and development.
Learning curveFortran has a steeper learning curve compared to C, especially for those who are new to programming.C has a relatively easier learning curve compared to Fortran, but it still requires some effort to master.

Frequently Asked Questions

How do I convert Fortran to C using CodeConvert AI?

Simply paste your Fortran code into the input box and click the Convert button. Our AI will analyze your Fortran code and produce equivalent C code in seconds, preserving the original logic and structure.

Is the converted C code accurate?

The AI produces high-quality C code that preserves the logic and functionality of your original Fortran code. It handles common patterns, data structures, and idioms for both Fortran and C. For complex or performance-critical code, we recommend reviewing and testing the output.

Can I also convert C back to Fortran?

Yes! CodeConvert AI supports bidirectional conversion. You can convert C to Fortran just as easily by using our C to Fortran converter. Try the C to Fortran Converter

Is the Fortran to C converter free?

Yes. You can convert Fortran to C for free without creating an account for up to 5 conversions per day. For higher limits and additional features, you can sign up for a Pro account.

What types of Fortran code can be converted to C?

This tool can convert a wide range of Fortran code to C — from simple functions and algorithms to complete programs with classes, error handling, and complex logic. The AI understands both Fortran and C idioms and produces natural-looking code.

What are the benefits of signing in?

Signing in unlocks CodeConvert AI's Pro tool — featuring more powerful AI models, an integrated chat assistant, code execution, personal notes, conversion history, and an enhanced interface. Every new account comes with 5 free credits to explore the full Pro experience.