Somebody know What is the name of this algorithm?

This is an algorithm for converting an string to an integer:

int n = 0;
for (i = 0; i < digits.lengt开发者_高级运维h; i++)
  n = n * 10 + (digits[i] - '0');

Somebody know what is the name of this algorithm? I need it for a reference in an article. I have used it but now I need some reference.

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If you had to give a name to it, most likely it would be atoi (like the C function)