WMLScript sqrt() º¯Êý

sqrt() º¯Êý·µ»ØÒ»¸öÊýµÄƽ·½¸ù¡£

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n = Float.sqrt(x)
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n ¸Ãº¯Êý·µ»ØµÄ¸¡µãÊý¡£
x Êý×Ö¡£

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var a = Float.sqrt(9);
var b = Float.sqrt(6.25);

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a = 3
b = 2.5
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