鏇村鏂囩珷瑙佸叕浼楀彿銆愬墠绔痗ss鍜宩s骞茶揣銆憄arseInt()鏄竴涓狫avaScript鍐呯疆鍑芥暟锛岀敤浜庝粠鏁板瓧瀛楃涓蹭腑瑙ｆ瀽鏁存暟銆備緥濡傦紝璁╂垜浠粠鏁板瓧瀛楃涓?100'涓В鏋愪竴涓暣鏁帮細constnumber=parseInt('100');number;//100姝ｅ棰勬湡鐨勯偅鏍凤紝'100'琚В鏋愪负鏁存暟100銆俻arseInt(numericalString,radix)杩樻帴鍙楃浜屼釜鍙傛暟锛氭暟瀛楀瓧绗︿覆鍙傛暟鎵€鍦ㄧ殑鍩烘暟銆俽adix鍙傛暟鍏佽鎴戜滑瑙ｆ瀽涓嶅悓鏁板瓧鍩烘暟鐨勬暣鏁帮紝鏈€甯歌鐨勬槸2銆?銆?0鍜?6銆傝鎴戜滑浣跨敤parseInt()鏉ヨВ鏋愪竴涓互2涓哄熀鏁扮殑鏁板瓧瀛楃涓诧細constnumber=parseInt('100',2);number;//4parseInt('100',2)灏?100'瑙ｆ瀽涓轰互2涓哄簳鐨勬暣鏁帮細鍥犳瀹冭繑鍥炲€?锛堝崄杩涘埗锛夈€?.parseInt()鐨勪竴涓鎬涓簆arseInt(numericalString)鎬绘槸灏嗗叾绗竴涓弬鏁拌浆鎹负瀛楃涓诧紙濡傛灉瀹冧笉鏄瓧绗︿覆锛夛紝鐒跺悗灏嗚鏁板瓧瀛楃涓茶В鏋愪负鏁存暟鍊笺€傝繖灏辨槸涓轰粈涔堟垜浠彲浠ワ紙浣嗕笉搴旇锛侊級浣跨敤parseInt()鏉ユ彁鍙栨诞鐐规暟鐨勬暣鏁伴儴鍒嗭細parseInt(0.5);//=>0parseInt(0.05);//=>0parseInt(0.005);//=>0parseInt(0.0005);//=>0parseInt(0.00005);//=>0parseInt(0.000005);//=>0鎻愬彇娴偣鏁扮殑鏁存暟閮ㄥ垎锛屽0.5銆?.05绛夛紝缁撴灉涓?銆傝繖涓€鍒囬兘寰堝ソ銆備絾鏄浣曟彁鍙?.0000005鐨勬暣鏁伴儴鍒嗗憿锛焢arseInt(0.0000005);//=>5parseInt()灏嗘诞鐐规暟0.0000005瑙ｆ瀽涓?..5.鏈夎叮涓旀湁鐐规剰澶?..涓轰粈涔坧arseInt(0.0000005)琛ㄧ幇濡傛濂囨€紵2.鎻紑parseInt()鐨勭绉橀潰绾辫鎴戜滑鍐嶇湅鐪媝arseInt(numericalString)瀵瑰畠鐨勭涓€涓弬鏁板仛浜嗕粈涔堬細濡傛灉瀹冧笉鏄竴涓瓧绗︿覆锛屽氨鎶婂畠杞崲鎴愪竴涓瓧绗︿覆锛岃В鏋愬畠锛岀劧鍚庤繑鍥炶В鏋愬悗鐨勬暣鏁般€傝繖鏄涓€涓嚎绱€傜劧鍚庤鎴戜滑灏濊瘯鎵嬪姩灏嗘诞鐐规暟杞崲涓哄瓧绗︿覆琛ㄧず褰㈠紡锛歋tring(0.5);//=>'0.5'瀛楃涓?0.05);//=>'0.05'瀛楃涓?0.005);//=>'0.005'瀛楃涓?0.0005);//=>'0.0005'瀛楃涓?0.00005);//=>'0.00005'瀛楃涓?0.000005);//=>'0.000005'瀛楃涓?0.0000005);//=>'5e-7'鏄惧紡杞崲涓篠tring(0.0000005)鐨勭粨鏋滀笌鍏朵粬娴偣鏁颁笉鍚岋細瀹冩槸鎸囨暟琛ㄧず娉曠殑瀛楃涓诧紒杩欐槸绗簩鏉♀€斺€斾篃鏄竴鏉￠噸瑕佺殑绾跨储锛佸綋鎸囨暟绗﹀彿瀛楃涓茶瑙ｆ瀽涓烘暣鏁版椂锛屾垜浠緱鍒版暟瀛?锛歱arseInt(0.0000005);//=>5//涓巔arseInt(5e-7)鐩稿悓锛?/=>5//涓巔arseInt('5e-7');鐩稿悓//=>5parseInt('5e-7')鍙鐞嗙涓€涓暟瀛?5'锛屼絾蹇界暐'e-7'銆傝皽鍥㈠凡缁忚В寮€锛佸洜涓簆arseInt()鎬绘槸灏嗗叾绗竴涓弬鏁拌浆鎹负瀛楃涓诧紝鎵€浠ュ皬浜?0-6鐨勬诞鐐规暟浠ユ寚鏁拌〃绀烘硶鍐欏叆銆傜劧鍚巔arseInt()浠庢诞鐐规暟鐨勬寚鏁扮鍙蜂腑鎻愬彇鏁存暟銆備綔涓烘梺娉紝涓轰簡瀹夊叏鍦版彁鍙栨诞鐐规暟鐨勬暣鏁伴儴鍒嗭紝寤鸿浣跨敤Math.floor()鍑芥暟锛歁ath.floor(0.5);//=>0Math.floor(0.05);//=>0Math.floor(0.005);//=>0Math.floor(0.0005);//=>0Math.floor(0.00005);//=>0Math.floor(0.000005);//=>0Math.floor(0.0000005);//=>03銆傛€荤粨parseInt()鏄竴涓皢鏁板瓧瀛楃涓茶В鏋愪负鏁存暟鐨勫嚱鏁般€傚皾璇曚娇鐢╬arseInt()鎻愬彇娴偣鏁扮殑鏁存暟閮ㄥ垎鏃跺繀椤诲皬蹇冦€傚皬浜?0-6鐨勬诞鐐规暟杞崲鎴愭寚鏁拌〃绀烘硶鐨勫瓧绗︿覆锛堟瘮濡?e-7灏辨槸0.0000005鐨勬寚鏁拌〃绀烘硶锛夛紝鍙浆鎹㈡暟瀛楅儴鍒嗭紝杩欏氨鏄痯arseInt杞崲灏忔诞鐐规暟鐨勫師鍥?)瀵艰嚧鎰忓缁撴灉鐨勫師鍥犮€備晶闈㈡寫鎴橈細浣犺兘瑙ｉ噴涓轰粈涔坧arseInt(9999999999999999999999)绛変簬1鍚楋紵浣滆€咃細DmitriPavlutin璇戣€咃細鍓嶇css鍜宩s骞茶揣鏉ユ簮锛歞mitripavlutin鏈€鍚庯紝濡傛灉鍠滄鎴戠殑鍒嗕韩锛岀粰鎴戠偣涓禐馃憤鎴栬€呭叧娉ㄢ灂鏄鎴戞渶澶х殑鏀寔锛屽叧娉ㄦ垜锛堝墠绔痗ss鍜宩s骞茶揣锛夎揣锛夛紝鍏紬鍙凤紝鍥炲銆愬姞缇ゃ€戯紝杩涚兢璺熷ぇ浣氦娴佸墠绔粡楠岋紒
