How to express pi in java

In Java, pi can be represented in the following ways: using the constant Math.PI: a double-precision floating point number with an accuracy of 15 decimal places. Using the Math.atan(1) function: Computes an approximation of π, with accuracy depending on the required accuracy.

How to express pi in Java

Pi, usually expressed as π, is an irrational number, that is, it cannot be expressed is the quotient of two integers. In Java, you can use the following method to represent π:

• Constant Math.PI: The Math.PI constant is provided in Java, and its value is a double-precision floating point number that approximates Π , the precision is 15 decimal places.
• Math.atan(1): You can use the Math.atan(1) function to calculate an approximate value of π. The atan function computes the arctangent in radians, and Π is equal to arctan(1).

Here's how to represent π in Java using these methods:

// 使用 Math.PI 常量
double pi = Math.PI;

// 使用 Math.atan(1) 函数
double pi = Math.atan(1);

It is worth noting that since π is an irrational number, any representation in Java can only be An approximation. The Math.PI constants are precise enough for most applications, but if greater precision is required, the Math.atan(1) function can be used.

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