Infinity
Baseline
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ãã®æ©è½ã¯åºãå®è£ ããã¦ãããå¤ãã®ãã¼ã¸ã§ã³ã®ç«¯æ«ããã©ã¦ã¶ã¼ã§åä½ãã¾ãã2015å¹´7æä»¥éããã¹ã¦ã®ãã©ã¦ã¶ã¼ã§å©ç¨å¯è½ã§ãã
Infinity ã¯ã°ãã¼ãã«ããããã£ã§ãç¡é大ãè¡¨ãæ°å¤ã§ãã
試ãã¦ã¿ã¾ããã
const maxNumber = 10 ** 1000; // æ£ã®æå¤§å¤
if (maxNumber === Infinity) {
console.log("Let's call it Infinity!");
// äºæ³ãããçµæ: "Let's call it Infinity!"
}
console.log(1 / maxNumber);
// äºæ³ãããçµæ: 0
å¤
Number.POSITIVE_INFINITY ã¨åãæ°å¤ã§ãã
Infinity ã®ããããã£å±æ§ | |
|---|---|
| æ¸è¾¼å¯è½ | ä¸å¯ |
| åæå¯è½ | ä¸å¯ |
| è¨å®å¯è½ | ä¸å¯ |
解説
Infinity ã¯ã°ãã¼ãã«ãªãã¸ã§ã¯ãã®ããããã£ã§ããè¨ãæããã°ã°ãã¼ãã«ã¹ã³ã¼ãå
ã®å¤æ°ã§ãã
Infinity ã®å¤ï¼æ£ã®ç¡é大ï¼ã¯ä»ã®ããããæ°å¤ããã大ããªå¤ã§ãã
ãã®å¤ã¯æ°å¦çã«ç¡é大ã®ããã«æ¯ãèãã¾ãã詳ãã㯠Number.POSITIVE_INFINITY ãåç
§ãã¦ãã ããã
ä¾
>Infinity ã®ä½¿ç¨
js
console.log(Infinity); /* Infinity */
console.log(Infinity + 1); /* Infinity */
console.log(10 ** 1000); /* Infinity */
console.log(Math.log(0)); /* -Infinity */
console.log(1 / Infinity); /* 0 */
console.log(1 / 0); /* Infinity */
仿§æ¸
| 仿§æ¸ |
|---|
| ECMAScript® 2027 Language Specification > # sec-value-properties-of-the-global-object-infinity > |