**Description:** `Math.sqrt()` method returns the square root value of the primitive data type. If a number is less than zero, it will return `NaN`. double a = Math ...
> 原文:[https://www . geesforgeks . org/big integer-sqrt-method-in-Java/](https://www.geeksforgeeks.org/biginteger-sqrt-method-in-java/) **Java . math . BigInteger ...