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What is the use of string function strtonum(string)?
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Answer / quickmist
strtonum() will reliably convert a string representation of a number into an integer number. It's reliable because you can pass the min and max value that the you want the input to be within and strtonum() will return an error code if the number falls outside the specified range. This function however expects only 1 '-' symbol to exist in the input and returns a long long integer.
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