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In C programming, converting strings to numbers is a common task that can be achieved using various functions. To convert a string to an integer, the atoi() function can be used, which stands for ASCII to integer. Similarly, atof() can convert a string to a double (floating-point number), and atol() can convert a string to a long integer. These functions are part of the standard C library and are straightforward to use. When implementing atoi() or similar conversions, one should handle potential errors, such as invalid input, to ensure robust and reliable code. Proper error handling is crucial for avoiding undefined behavior.

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