JavaScript PI 属性
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定义和用法
PI 属性就是 π，即圆的周长和它的直径之比。这个值近似为 3.141592653589793。
语法
Math.PI
技术细节
| 返回值： | 数值，表示 PI。 |
|---|---|
| JavaScript 版本： | ECMAScript 1 |
Browser support
Math.PI Is ES1 feature (JavaScript 1999). All browsers fully support it:
| Chrome | IE | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|---|
| Support | Support | Support | Support | Support | Support |
Related pages
Tutorial:JavaScript math
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