<P> In mathematics, the greatest common divisor (gcd) of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers . For example, the gcd of 8 and 12 is 4 . </P> <P> The greatest common divisor is also known as the greatest common factor (gcf), highest common factor (hcf), greatest common measure (gcm), or highest common divisor . </P> <P> This notion can be extended to polynomials (see Polynomial greatest common divisor) and other commutative rings (see below). </P>

What is the meaning of hcf in mathematics