codecademy math

Math.random (): Returns any number between 0-1, excluding 0 and 1;Math.floor (num): Returns an integer less than or equal to num, equal to four rounding, not five in; Example: Math.floor (1.0); Math.floor (1.5); Math.floor (1.9); return 1;Math.Round (num): num is rounded; Example: Math.Round (1.0); Math.Round (1.4); return 1;/math.round (1.5); Math.Round (1.9); return 2;Math.ceil (num): Returns the smallest integer greater than or equal to Num; Math.ceil (1.0); returns 1;/math.ceil (1.1); Math.c

Example:PrintHex (), Hex (-20)#Convert to hexadecimalPrintOct (+), Oct (-20)#Convert to octalPrintBin (+), Bin (-20)#convert to BinaryPrintint"Literal value", in-System)#Convert integral typePrintFloat"Literal value")#convert floating point typePrintRound (floating point type)#floating-point roundingMath Method:Math.PI =π Value 3.141592653Math.pow (2,4) = 16 2 of 4 Times SquareMATH.SQRT (144) = 12 144 Open Square =12　　Python hex () Oct () () math buil

Create a Time objectvar time=new Date(); //当前时间,()内可写入字符串 ，如‘2017-10-10‘,可转为响应的时间Common methodstime.getFullYear(); //从 Date 对象以四位数字返回年份。time.getMonth(); //从 Date 对象返回月份 (0 ~ 11)。time.getDate()； //从 Date 对象返回一个月中的某一天 (1 ~ 31)。time.getDay()； //从 Date 对象返回一周中的某一天 (0 ~ 6)。周日为0；time.getHours()； //返回 Date 对象的小时 (0 ~ 23)。time.getMinutes()； //返回 Date 对象的分钟 (0 ~ 59)。time.getSeconds()； //返回 Date 对象的秒数 (0 ~ 59)。time.getMilliseconds()； //返回 Date 对象的毫秒(0 ~ 999)。time.getTime()；

Find the maximum value in a set of datavar result = Math.max (10, 20, 39, 40);alert (result);Customizing an object to implement the System method Max methodfunction MyMath () { Added a method This.getmax = function () { var max = arguments[0]; for (var i = 0; i if (Arguments[i] > max) { max = Arguments[i]; } } return Max; };}Instance Objectvar mt = new MyMath ();var result1 = Mt.getmax (1, 3, 6, 9, 2, 6, 3);alert (RESULT1

Sin (x): Finding the sine of Xcos (x): Finding the cosine of XASIN (x): Finding the inverse of XACOs (x): Finding the inverse cosine of xTan (x): Find the tangent of XAtan (x): To find the inverse tangent of XHypot (x, y): To find the hypotenuse length of right triangleFmod (x, y): Find the remainder of X/yCeil (x): Take the smallest integer not less than XFloor (x): A chia integer not greater than XFabs (x): Absolute valueEXP (x): x power of EPow (x, y): The Y power of XLOG10 (x): The logarithm

-row **3.int rand_r (unsigned int *seedp); Generate random number seeds in general, the parameters can be filled in time (NULL), the seed is different random values **4.int rand (void); The random value in [0, Rand_max] cannot be re-entered, there is a secure version _r** /The above is a summary of time-date functions, mathematical functions, algorithm functions and so on.The next step is to summarize the sockets, thre

beyond the range of these values. For example, light is 171! (171 * 170 * 169 * 168 * ... * 1) exceeds the double maximum value. Float can only represent 35! The number within. A very small number (a number close to 0) can also cause trouble, and it is very dangerous to compute very large numbers and very small numbers. To address this issue, the floating-point math IEEE 754 standard (see resources) adds special value INF and NaN, which represent in

will also output the name of the variable to the terminalThe-s input is not displayed in the terminalTput setting up terminal-relatedTput Cup x y #将当前光标位置置于x y-coordinate pointTput SC #存储当前光标的位置 Store Current "should not be current"Tput RC #置回之前存储到的光标位置 Restore CTput Ed #删除当前光标位置到行尾的内容Here is a very interesting shell bar, receive input an integer "must be an integer, and then display on the screen count:1--Count:2---> count:n" The position of the number does not change#!/bin/bashRead numberEcho

-subtraction:$ let two--It is also possible to abbreviate:$ let one+=2 $ let two-=1 respectively equal to $ let one = one + 2 and $ let two = Two-1The operator [] also has a function similar to the Let commandYou can also use (()), but note that you need to add $before the variable name, or you will get an error. The above method is only suitable for operations between integers, and does not support decimals.Real life without decimals that is almost impossible, of course, the Shell is not so si