NAME

abs − integer absolute value

SYNOPSIS

abs(i)
int i;

DESCRIPTION

Abs returns the absolute value of its integer operand. 

SEE ALSO

floor(3M) for fabs

BUGS

Applying the abs function to the most negative integer generates a result which is the most negative integer.  That is,

abs(0x80000000)

returns 0x80000000 as a result. 

7th Edition