Summary of js methods to get the last digit of a string_javascript skills

Method 1: Use the charAt method under the String object

The charAt() method returns the character at the specified position.

Copy code The code is as follows:

str.charAt(str.length – 1)

Please note that JavaScript does not have a character data type distinct from the string type, so the characters returned are strings of length 1

Method 2: Use the substr method under the String object

The

substr() method can extract the specified number of characters starting from the start subscript in the string.

Copy code The code is as follows:

str.substr(str.length-1,1)

Important: ECMAscript does not standardize this method and therefore discourages its use.

Important: In IE 4, the value of parameter start is invalid. In this BUG, ​​start specifies the position of the 0th character. (www.jb51.net) This BUG has been corrected in later versions.

Method 3: Use the split method under the String object

The split() method is used to split a string into an array of strings.

Copy code The code is as follows:

var str = “123456″;
spstr = str.split("");
spstr[spstr.length-1];

Method 4: Get it done with regular rules

Copy code The code is as follows:

<script type="text/javascript">
//<![CDATA[
var s = "nasofj;n234n41;v";
alert("String: " s "nn" "LastOne: " s.replace(/^(.*[n])*.*(.|n)$/g, "$2"));
//]]>
</script>

The above are the 4 methods that I know. They are all recorded. Friends in need can refer to them. If you have other methods, please let me know. Thank you