In this file, we are discussing the concept of a file and only the list of important file handling functions. 
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 It covers opening modes of files, standard function: fopen(), fclose()
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 In this, I have discussed the topic “how to write into a file using C program” for which used some standard functions: fputc(), fprintf(), fwrite()
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 In this, Topic discussed is “how to read data from a file using C program” for which used some standard functions: fgetc(), fscanf(), fread()
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 In this file, we are discussing some other important standard functions: fseek(), ftell(), rewind()
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