The string method in js

1.charAt()

Returns a string at the specified position (n)

var str="javascript is a very important language!" ; document.write(str.charAt(9))Copy the code

The output

2.charCodeAt()

Returns the Unicode encoding of the string at the specified position (n)

var str="javascript is a very important language!" ; document.write(str.charCodeAt(9))Copy the code

The output

3.indexOf()

Returns the position of a substring in a string

var str="javascript is a very important language!" ; document.write(str.indexOf("very"))Copy the code

The output

4.substring()

Extracts the character between two specified index numbers in a string.

var str="javascript is a very important language!" ; document.write(str.indexOf("very"))Copy the code

The output