▁computed ▁digits ▁with ▁a ▁limited ▁precision ▁( not ably ▁within ▁standard ▁JavaScript ▁or ▁EC MA Script ▁interface ▁bind ings ). ▁ ▁Other ▁round ing ▁standards ▁Some ▁discipl ines ▁or ▁institutions ▁have ▁issued ▁standards ▁or ▁direct ives ▁for ▁round ing . ▁ ▁US ▁weather ▁observations ▁In ▁a ▁guid eline ▁issued ▁in ▁mid - 1 9 6 6 , ▁the ▁U . S . ▁Office ▁of ▁the ▁Federal ▁Co ordin ator ▁for ▁Meteor ology ▁determined ▁that ▁weather ▁data ▁should ▁be ▁rounded ▁to ▁the ▁nearest ▁round ▁number , ▁with ▁the ▁" round ▁half ▁up " ▁tie - bre aking ▁rule . ▁For ▁example , ▁ 1 . 5 ▁rounded ▁to ▁integer ▁should ▁become ▁ 2 , ▁and ▁− 1 . 5 ▁should ▁become ▁− 1 . ▁Prior ▁to ▁that ▁date , ▁the ▁tie - bre aking ▁rule ▁was ▁" round ▁half ▁away ▁from ▁zero ". ▁ ▁Neg ative ▁zero ▁in ▁meteor ology ▁ ▁Some ▁meteor olog ists ▁may ▁write ▁" − 0 " ▁to ▁indicate ▁a ▁temperature ▁between ▁ 0 . 0 ▁and ▁− 0 . 5 ▁degrees ▁( ex clus ive ) ▁that ▁was ▁rounded ▁to ▁an ▁integer . ▁This ▁notation ▁is ▁used ▁when ▁the ▁negative ▁sign ▁is ▁considered ▁important , ▁no ▁matter ▁how ▁small ▁is ▁the ▁magnitude ; ▁for ▁example , ▁when ▁round ing ▁temper atures ▁in ▁the ▁Cel si us ▁scale , ▁where ▁below ▁zero ▁indicates ▁free zing . ▁ ▁See ▁also ▁ ▁Gal ' s ▁accurate ▁tables ▁ ▁Inter val ▁arithmetic ▁ ▁ISO ▁ 8 0 0 0 0 - 1 ▁