JSON and Math use case analysis in JS

This time I will bring you a case analysis of JSON and Math in JS. What are the precautions for using JSON and Math in JS? Here are the actual cases, let’s take a look.

1.JSON

JSON：

对象格式的字符串
轻量的数据传输格式

Notes: Key name needs to be usedDouble quotes Wrap it up

JOSN has two methods: JSON.parse and JSON.stringify.

• #JSON.parse converts the string sent from the background into an object. This conversion is needed only when the content of the string is the object.

• JSON.stringify, converts the object sent from the background into a string.

The result is.

2.Math — Part1

Math.ceil

对数向上取整

Math.floor

对数向下取整

Math.random

取0到1的随机数。包括0，但不包括1。

Math.abs

取绝对值

Example:

3.Usage of Math.random

1. Take a random integer from 0 to 10

2. Take a number between 5 and 7

4.Math—Part2

Math.max

取到最大数

Math. min

取到最小数

Math.PI

取到圆周率

Usage of Math.PI:

将弧度转化为角度 deg=rad/Math.PI*180;
将角度转化为弧度 rad=deg/180*Math.PI;

5.Math— Part3

Math.pow(num,n);

num的n次方。
n个num相乘

Math.sqrt(mun);

num的平方根

Examples

1.JSON

JSON：

对象格式的字符串
轻量的数据传输格式

Notes: The key name needs to be wrapped in double quotes

JOSN has two methods: JSON.parse and JSON.stringify.

• #JSON.parse converts the string sent from the background into an object. This conversion is needed only when the content of the string is the object.

• JSON.stringify, converts the object sent from the background into a string.

The result is.

2.Math — Part1

Math.ceil

对数向上取整

Math.floor

对数向下取整

Math.random

取0到1的随机数。包括0，但不包括1。

Math.abs

取绝对值

Example:

3.Usage of Math.random

1. Take the random integer from 0 to 10

2. Take the random number between 5 and 7 Number

4.Math—Part2

Math.max

取到最大数

Math.min

取到最小数

Math.PI

取到圆周率

Usage of Math.PI:

将弧度转化为角度 deg=rad/Math.PI*180;
将角度转化为弧度 rad=deg/180*Math.PI;

5.Math—Part3

Math.pow(num,n);

num的n次方。
n个num相乘

Math.sqrt(mun);

num的平方根

Examples

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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