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JavaScript中整数的安全范围是什么?

Aug 28, 20231 min read

在JavaScript中,整数的安全范围是$-2^{53} \sim 2^{53}$,即$-9007199254740992 \sim 9007199254740992$。这是由于JavaScript使用双精度浮点数表示所有数字,因此仅存在$52$位的整数位,再加上一个符号位,所以最大的安全整数范围是$2^{53}$。超出这个范围的整数将被截断为接近的浮点数并且会失去精度。

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