JavaScript 中階教學 : 數學 - TAIWANTC.COM

document.write("Math.E = " + Math.E); document.write("Math.LN2 = " + Math.LN2); document.write("Math.LOG2E = " + Math.LOG2E); ... function round_dp(num , dp) {var sh = Math.pow(10 , dp) return Math.round(num * sh) / sh} var ...

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