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mongodb r go kotlin sass scipy bash rust all our services dark mode services filter input w3schools offers a wide range of services and products for beginners and professionals helping millions of people everyday to learn and master new skills free tutorials enjoy our free tutorials like millions of other internet users since 1999 references explore our selection of references covering all popular coding languages w3schools app new for ios android start a new learning adventure create a website create your own website with w3schools spaces no setup required exercises test your skills with different exercises quizzes test yourself with multiple choice questions code challenges test your skills with interactive code challenges get certified document your knowledge log in sign up create an account to track your progress league earn xp and climb the ranks with different challenges upgrade become a plus user and unlock powerful features ad free hosting support where to start not sure where 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example extended types code challenge c type conversion c constants c operators operators arithmetic assignment comparison logical precedence code challenge c booleans booleans real life examples code challenge c if else if else else if short hand if nested if logical operators real life examples code challenge c switch switch code challenge c while loop while loop do while loop real life examples code challenge c for loop for loop nested loops real life examples code challenge c break continue c arrays arrays array size array loops real life examples multidimensional arrays code challenge c strings strings special characters string functions code challenge c user input c memory address c pointers pointers pointers arrays pointer arithmetic pointer to pointer code challenge c functions c functions c function parameters c scope c function declaration c functions challenge c math functions c inline functions c recursion c function pointers function pointers callback functions c files c create files c write to files c read files c structures c structures c structs challenge c nested structures c structs pointers c unions c typedef c struct padding c enums c enums enums code challenge c memory c memory management c allocate memory c access memory c reallocate memory c deallocate memory c structs and memory c memory example c errors c errors c error challenge c debugging c null c error handling c input validation c more c date c random numbers c macros c organize code c storage classes c bitwise operators c fixed width integers c projects c projects c cert c certificate c reference c reference c keywords c stdio h c stdlib h c string h c math h c ctype h c time h c examples c examples c real life examples c exercises c quiz c code challenges c practice problems c compiler c syllabus c study plan c interview q a c tutorial home next learn c c is a general purpose programming language that has been widely used for over 50 years c is very powerful it has been used to develop operating systems databases applications etc learn c now become c certified get certified with our c exam includes a professionally curated study kit to guide you from beginner to exam ready get certified share link copied examples in each chapter our try it yourself editor makes it easy to learn c you can edit code and view the result in your browser example include stdio h int main printf hello world return 0 try it yourself c exercises many chapters in this tutorial end with an exercise where you can check your level of knowledge see all c exercises what you ll learn this tutorial will guide you step by step with examples and exercises along the way how c programs are structured variables data types and operators if statements loops and arrays functions and how to reuse code pointers and memory structures to organize related data reading from and writing to files organizing programs and build real life projects c quiz check your understanding with a short quiz and see how 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