How can a string be converted to a number?

The function takes the string as an input that needs to be converted to an integer.

int atoi(const char *string)

Return Value:

• On successful conversion, it returns the desired integer value
• If the string starts with alpha-numeric char or only contains alpha-num char, 0 is returned.
• In case string starts with numeric character but is followed by alpha-num char, the string is converted to integer till the first occurrence of alphanumeric char.