format(1.5555,0) format(123.5555,1) format(1234.5555,2) format(12345.5555,3) format(123456.5555,4) format(1234567.5555,5) format("12345.2399",2) 2 123.6 1,234.56 12,345.556 123,456.5555 1,234,567.55550 12,345.24 inet_ntoa(inet_aton("255.255.255.255.255.255.255.255")) 255.255.255.255.255.255.255.255 inet_aton("255.255.255.255.255") inet_aton("255.255.1.255") inet_aton("0.1.255") 1099511627775 4294902271 511 inet_ntoa(1099511627775) inet_ntoa(4294902271) inet_ntoa(511) 255.255.255.255.255 255.255.1.255 0.0.1.255