NAME pix - number of primes not exceeding specified number SYNOPSIS pix(n [,err]) TYPES n real err integer return nonnegative integer, or err DESCRIPTION If n is fractional or n >= 2^32, pix(n) causes an error, pix(n, err) returns the value of err. If n is an integer < 2^32, pix(n) returns the number of primes (2, 3, 5, ...) less or equal to n. EXAMPLE > for (i = 0; i <= 20; i++) print pix(i),:; 0 0 1 2 2 3 3 4 4 4 4 5 5 6 6 6 6 7 7 8 8 > print pix(100), pix(1000), pix(1e4), pix(1e5), pix(1e6) 25 168 1229 9592 78498 > print pix(2^32 - 1, -1), pix(2^32, -1) 203280221 -1 LIMITS none LIBRARY long zpix(ZVALUE z) FULL pix(FULL x) SEE ALSO XXX - fill in