JavaScript manipulation operators

Operation operators:

var a = 1+ "a" +1+1;console.log (a);

Code Execution procedure: 1+ string a+1+1 = 1a11.

var a = 1+1+ "a" +1;console.log (a);

The comparison operator calculates the method from left to right, and any number type is added to the string equal to the string, because A is a string of all equals 1a11.

var a = 1/0;console.log (a); var B = -1/0;console.log (b);

Result: Code execution process a equals infinity; b equals-infinity;
Infinity(无穷); Infinity虽然是个英文单词，但它是一个数字类型。

var a = 0/0;console.log (a);

Result: a equals nan;
NaN(Not a Number) 0除以0，除不了，不是个数是非数，但非数也算个数。

var a = 1%5;console.log (a);

The result equals: 1;
因为1除以5除不尽，余数1，所以等于1。

var a = 10%5;console.log (a);

Results: 0;
因为10除以5，等于2没有余数，所以等于0;

var a = 1;var B = A + + +1, (A + 1 is assigned to b,a itself plus 1) console.log (b);

Result: b equals 2.
因为“++” 如果放后边是等语句执行完再自身加1。

var a = 1;var B = ++a + 1; (a itself plus 1 equals 2, plus 1) console.log (b);

Result: b equals 3.
因为“++”如果放前边是先自身加1在执行语句。

var a = 1;var B = ++a + 1; (a itself plus 1 equals 2, plus 1) console.log (b);

Add:
a+=10 = = = A+10;
Priority: "=" The Weakest, "()" has the highest priority.

Little Practice One:

var a = (3-5/6 + 1)%2;var B = 3;    b%= A + 3;    document.write (a++);    document.write (--b);

Little Exercise Two:

var a = 123;var B = 234;

The values of A and B are interchanged without creating new variables.

If there is a misunderstanding in the text, please point out the criticism ~ (≧▽≦)/~

JavaScript manipulation operators