Math is often seen in the code. round, parseint, and math. although the three functions of floor are known to return an integer at the end of the result, the difference between them is still unclear. Today we will make a summary.
I. Math. Round
The Math object is different from the above object. It can be said to be a common mathematics class, which has many mathematical methods used for various mathematical operations, but Math objects do not need to be constructed, you can directly use
Math is a built-in js object and does not need to be created, so it does not need to be instantiated. It only has static attributes and static method Math object attributes: 1. E attribute is approximately 2.718. 2. The LN2 attribute returns the
Math. Round (11.5) and so on? Math. Round (-11.5) and so on?
The math class provides three methods related to rounding: Ceil, floor, and round. The functions of these methods correspond to the meanings of their English names. For example, the
In flash, the math class is a very common class. Through mathematical computation, we can achieve a lot of wonderful results. Here we will start from the most basic learning and add a math knowledge.
Let's take a look at the math class provided in
This article briefly introduces Date (Date object) and Math object in JavaScript. For more information, see
Date object
1. What is a Date object?
A date object can store any date, and can be precise to the number of milliseconds (1/1000 seconds
Study Notes of the Random and Math modules in Python
This article mainly introduces the study notes of the Random and Math modules in Python. This article describes the mathematical constants, common simple functions, and trigonometric functions of
This article mainly introduces the study notes of the Random and Math modules in Python. This article describes the mathematical constants, common simple functions, and trigonometric functions of the math module, describes the common functions,
Learning notes of the Random and Math modules in Python, pythonrandom
Since the random, math, and time''datetime modules in Python are often used recently, it is decided to take a moment to learn about the time system.
1. math Module
Functions in
1. discard the fractional part and keep the integer part parseInt (5/2) 2. rounded up. If there is a decimal number, add 1Math to the integer. ceil (5/2) 3, rounded down. math. round (5/2) 4, round down Math. floor (5/2) Math object method FF:
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