the round is rounded ... Ceiling is rounding up. Float is rounded downHere are a few ways to round decimal values to integers: Math.ceil (), Math.floor (), and Math.Round (). These three methods follow the following rounding rules, respectively:Math.ceil () performs an upward rounding, that is, it always rounds the value up to the nearest integer;Math.floor () Performs a downward rounding, that is, it always rounds the value down to the nearest integer;Math.Round () performs a standard rounding,
to 25.5, or 25. Finally, Math.floor () returns 25 for all values between 25 and 26 (not including 26).Here are some additions:Ceil (): The fractional part is rounded to the integer part.Such as:Math.ceil (12.2)//Return 13math.ceil (12.7)//return 13math.ceil (12.0)//return 12Floor (): All are left, only integers are reserved.Such as:Math.floor (12.2)//Return 12math.floor (12.7)//return 12math.floor (12.0)//return 12Round (): RoundingSuch as:Math.Round (12.2)//Return 12math.round (12.7)//return 1
Math. ceil (x) -- returns the smallest integer greater than or equal to the number parameter (take the entire function) and rounds up the number. The following is a good example. If you are interested, refer
Script> vara=3.14; varA1=Math.ceil (a);//the smallest integer greater than the current decimal;alert (A1); varA2=Math.floor (a);//the largest integer less than the current decimal;alert (A2); varA3=Math.sqrt (a);//Open Squarealert (A3); varA4=Math.Round (a);//Roundingalert (A4); varA5=math.random ();//random number, between 0-1alert (A5);Script>Script> vars="ABC"; varReg="ABDC"; varx=S.match (reg);//s represents a string, and Reg represents a string that matches both, and returns a null if
An anonymous function is a function without a real name.
A function is an event-driven or reusable code block that is executed when it is called.
A function is an object and has its own attributes and methods. First, let's take a look at the function attribute
Math. ceil (): roundNumber up
Arguments: Any numeric value or expression
Returns: The closest integer greater than or equalX.
understanding of the length attribute is helpful to the flexible application in the development process.
2, prototype property
Returns a reference to the object type prototype. The prototype property is common to object.
The objectname parameter is the name of the object.
Description: Provides a set of basic functions for an object's class with the prototype property. The operation of the new instance of the object, "inherit
Definition and usage
The push method can add one or more elements to the end of an array and return a new length.
The join method is used to add all elements in the array to a specified string. The elements are separated by the specified separator.
~59) month (date) Returns the month value of date (1~12) MONTHNAME (date) Returns the month name of date. such as: Selectmonthname (current_date); Now () Returns the current date and time quarter (date) Returns a date in the quarter of the year (1~4), such as Selectquarter (current_date); WEEK (date) Return date is the first week of the year (0~53) years (date) Returns the year of date (1000~9999) Some examples: Get current system time: S
Python)The third line indicates the parameter of the function. There are two parameters, which are also the method of calling the function.The fourth line is a description of the function, returns the result of x ** y, and explains the meaning of x ** y later.Finally, press the q key to return to the Python interaction mode.An additional information is shown above, that is, the pow function is equivalent to x ** y, and both calculate the power of y of x.
>>> 4**216>>> math.pow(4,2)16.0>>> 4*28
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