JavaScript里四舍五入函数round的用法实例 本文实例讲述了JavaScript里四舍五入函数round用法。分享给大家供大家参考。具体如下: JavaScript的Math对象包含了一个round方法用于对数字进行四舍五入*作,下面的代码详细演示了其用法 Clickthebuttontoroundthenumber2.5toitsnearestinteger. Tryit functionmyFunction(){document...
JavaScript Code: // Define a function named int_round5 that rounds a number up to the nearest multiple of 5.functionint_round5(num){// Divide the number by 5, round the result up to the nearest integer, then multiply by 5.returnMath.ceil(num/5)*5;}// Output the result of roundin...
1、 指定要保留的小数位数(0.1+0.2).toFixed(1) = 0.3;这个方法toFixed是进行四舍五入的也不是很精准,对于计算金额这种严谨的问题,不推荐使用,而且不同浏览器对toFixed的计算结果也存在差异。 2、把需要计算的数字升级(乘以10的n次幂)成计算机能够精确识别的整数,等计算完毕再降级(除以10的n次幂),这是大部分...
具体如下: JavaScript 的.Math 对象包含了一个 round 方法用于对数字进行 四舍五入操作,下面的代码详细演示了其用法 Clickthebuttontoroundthenumber2.5toitsnearestinteger. Tryit functionmyFunction(){document.getElementById(demo).inn erHTML=Math.round(2.5);} 希望本文所述对大家的 javascript 程序设计有所...
// round the number to nearest integer let roundedNumber = Math.round(number); console.log(roundedNumber); // Output: 4 Run Code Math.round() Syntax The syntax of the Math.round() function is: Math.round(x) round(), being a static method, is called using the Math class name. Mat...
代码语言:javascript 代码运行次数:0 运行 deffloor(x,*args,**kwargs):# real signature unknown;NOTE:unreliably restored from __doc__""" floor(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj]) Return the floor of the input...
本文实例讲述了JavaScript里四舍五入函数round用法。分享给大家供大家参考。具体如下: JavaScript的Math对象包含了一个round方法用于对数字进行四舍五入操作,下面的代码详细演示了其用法 <!DOCTYPE html> Click the button to round the number 2.5 to its nearest integer. Try it [removed...
if (typeof exp === "undefined" || +exp === 0) { return Math[type](value); } value = +value; exp = +exp; // If the value is not a number or the exp is not an integer... if (isNaN(value) || !(typeof exp === "number" && exp % 1 === 0)) { return NaN; } ...
JavaScript has native methods for rounding numbers, but they only round floats (numbers with decimals) to the nearest whole number. I recently needed a way to round a whole number to the nearest 10, 100, and so on. Let me show you what I did. The backgro
The Math.round() method rounds its number value argument to the nearest integer based on typical mathematical rounding. So, if the decimal point of the number is greater than or equal to 0.5, it rounds up to the next higher absolute value, but if is lower than 0.5, it rounds down to ...