Run vs lilC

Run-C is a hands-on way to learn and practice the C programming language right on your iPhone or iPad, completely offline. Write real C code, tap Run, and see your output instantly. No internet, no accounts, and no complicated setup. Whether you are taking your first steps in programming or brushing up on the fundamentals, Run-C gives you a focused environment to experiment, make mistakes, and learn by doing. GUIDED LEARNING PATH Run-C includes 15 ready-to-run example programs organized into a Beginner Path that builds your skills step by step: - Hello World: your first program and printf - For Loop Sum: loops and integer math - If/Else: branching with conditions - Countdown: while loops and decrement - Multiplication Table: nested output in a loop - Average, FizzBuzz, Max of Three, Factorial, Power - Prime Check, GCD, Fibonacci, Hex and Char, Collatz Steps Each example comes with a short description so you understand what it teaches before you run it. A REAL CODE EDITOR - Syntax highlighting for keywords, comments, and strings - Line numbers with a clean gutter - Smart auto-indentation on new lines - Automatic bracket, parenthesis, and quote pairing - A dedicated C-symbol keyboard bar for fast access to common symbols - Live line and character counts INSTANT OFFLINE OUTPUT - Runs your C program locally on device, no network required - Clear Output console with selectable text - Separate Warnings tab that surfaces issues without cluttering your results - Error lines highlighted directly in the editor so you can find and fix mistakes fast - Run timing so you can see how quickly your program executes PRIVATE BY DESIGN Your code never leaves your device. Compilation and execution happen entirely on-device, so you can learn and experiment anywhere, even without a connection. WHO IT IS FOR - Students learning C in school or on their own - Developers who want a quick scratchpad for small C snippets - Anyone curious about how programming works, in a friendly, no-pressure environment Run-C focuses on core C language constructs for learning: control flow, numbers, strings, and basic I/O with printf. Some advanced features and system-level APIs are intentionally not supported on iOS. Questions or feedback? Email kshravi86@gmail.com.

lilC is a free C editor for iPhone and iPad. Write a program, press Run, and PicoC interprets it on this device. There is no cloud compiler and no Linux VM. No account. No in-app purchases. Files stay on your iPhone or iPad. You do not need a network connection to write or run C. This version has no AI. FIRST HOUR Six lessons, then twelve challenges. Each is an almost-complete C program with one ??? blank. Fill in the blank, press RUN, and see the output on the same screen. The first hour walks through hello, variables, if, loops, arrays, and functions. Challenges continue in the same editor with problems such as Two Sum, Fizz Buzz, Fibonacci, and valid parentheses. You are writing and running C — not tapping through a quiz that hides the language. WHAT YOU CAN DO • Edit C with find-in-file, a C symbol keyboard, and jump-to-error • Run and Stop programs, including stdin while a program waits • Read diagnostics written for learners, not only raw PicoC jargon • Keep files and projects on this device, including erase-all • Choose Light or Dark appearance HONEST LIMITS lilC runs C with PicoC, a small on-device interpreter. It is not GCC, not Clang, and not a full ISO C compiler. Most beginner programs work. A complete standard library, or extras only a desktop toolchain supports, will not. WHO IT IS FOR Students who want to run C on a phone, with a guided first hour and errors they can jump to. Developers who want a real, limited C interpreter in their pocket — files, projects, stdin — not a toy.