"How to Represent Pi in Java" |21xrx.com

"How to Represent Pi in Java"

2023-06-16 10:24:21 深夜i -- --

Java

"How to Represent Pi in Java"

When working with circles or trigonometry in Java, it's often necessary to represent pi accurately. Fortunately, Java provides two built-in constants for pi: Math.PI and StrictMath.PI. Both constants represent pi with double-precision floating-point values, but StrictMath.PI is more precise than Math.PI.

To use pi in Java, simply refer to either constant as needed. For example, to calculate the circumference of a circle with a radius of 10 units, you could write:

double circumference = 2 * Math.PI * 10;

Or, if you need more precision, you could write:

double circumference = 2 * StrictMath.PI * 10;

In some cases, you may need to define your own constant for pi, such as if you're working with a library that requires a specific precision. In this case, you can declare a final double variable and assign it the value of Math.PI or StrictMath.PI, like so:

final double PI = Math.PI;

Overall, representing pi in Java is simple and straightforward thanks to its built-in constants.

pi, Math.PI, StrictMath.PI, floating-point, precision.

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