Atoi

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The atoi function in the C programming language is used to convert a string into a numerical representation.

int atoi (const char *string)

Where string is the string, represented by an array of characters. When atoi encounters a string with no numerical sequences, it returns a '0' (zero). Also, if the string were to hold a '0' as character, it would also return a '0', making it impossible to tell the difference between the two.

See also

• itoa

 

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