如何获得数字的最后一位

Question

How to extract last(end) digit of the Number value using jquery. because i have to check the last digit of number is 0 or 5. so how to get last digit after decimal point

For Ex. var test = 2354.55 Now how to get 5 from this numeric value using jquery. i tried substr but that is only work for string not for Number format

Like if i am use var test = "2354.55";

then it will work but if i use var test = 2354.55 then it will not.

Answer 1

This worked for us:

 var sampleNumber = 123456789, lastDigit = sampleNumber % 10; console.log('The last digit of ', sampleNumber, ' is ', lastDigit);

Works for decimals:

 var sampleNumber = 12345678.89, lastDigit = Number.isInteger(sampleNumber) ? sampleNumber % 10 : sampleNumber.toString().slice(-1); console.log('The last digit of ', sampleNumber, ' is ', lastDigit);

Click on Run code snippet to verify.

Answer 2

Try this one:

 var test = 2354.55; var lastone = +test.toString().split('').pop(); console.log("lastone-->", lastone, "<--typeof", typeof lastone); // with es6 tagged template and es6 spread let getLastDigit = (str, num)=>{ return num.toString(); }; let test2 = 2354.55; let lastone2 = +[...getLastDigit`${test2}`].pop(); console.log("lastone2-->", lastone2, "<--typeof", typeof lastone2);

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Updates with ES6/ES2015:

We can use tagged template in such case as numbers are not iterable. So, we need to convert the number to a string representation of it. Then just spread it and get the last number popped.

Answer 3

you can just convert to string

var toText = test.toString(); //convert to string
var lastChar = toText.slice(-1); //gets last character
var lastDigit = +(lastChar); //convert last character to number

console.log(lastDigit); //5

Answer 4

Here is another one using .slice() :

 var test = 2354.55; var lastDigit = test.toString().slice(-1); //OR //var lastDigit = (test + '').slice(-1); alert(lastDigit);

Answer 5

There is a JS function .charAt() you can use that to find the last digit

 var num = 23.56 var str = num.toString(); var lastDigit = str.charAt(str.length-1); alert(lastDigit);

Answer 6

If you want the digit in the hundredths place , then you can do the following:

test * 100 % 10

The problem with convert to string and getting the last digit is that it does not give the hundredths place value for whole numbers.

Answer 7

Just in one line.

 const getLastDigit = num => +(num + '').slice(-1); console.log(getLastDigit(12345)) // Expect 5

Answer 8

toString() converts number to string, and charAt() gives you the character at a particular position.

 var str = 3232.43; lastnum = str.toString().charAt( str.length - 1 ); alert( lastnum );