Convert letters to numbers javascript
You can use this numerical value calculator-it adds up all letter values- for any string (Not Case Sensitive): Show
https://jsfiddle.net/nonidentified/0xydecze/1/ There are many ways to convert a string into a number using JavaScript. But what does that look like in code? In this article, I will show you 11 ways to convert a string into a number. One way to convert a string into a number would be to use the In this example, we have a string called
If we used the
We can convert
We can check that it is now a number by using the
If you tried to pass in a value that cannot be converted into a number, then the return value would be
How to convert a string to a number in JavaScript using the parseInt() functionAnother way to convert a string into a number is to use the A radix is a number between 2 and 36 which represents the base in a numeral system. For example, a radix of 2 would represent the binary system, while a radix of 10 represents the decimal system. We can use the
What happens if I try to change the
As you can see, the result is a rounded integer. If you wanted to return a floating point number, then you would need to use How to convert a string to a number in JavaScript using the parseFloat() functionThe If we modify our example from earlier to use
If you have leading or trailing whitespace in your string, then
If the first character in your string cannot be converted into number, then
How to convert a string to a number in JavaScript using the unary plus operator (+)The unary plus operator (
We can also use the unary plus operator (
If the string value cannot be converted into a number then the result will be
How to convert a string to a number in JavaScript by multiplying the string by the number 1Another way to convert a string into a number is to use a basic math operation. You can multiply the string value by 1 and it will return a number.
As you can see, when we multiply the In this example, JavaScript is converting our string value to a number and then performing that mathematical
operation. If the string cannot be converted to a number, then the mathematical operation will not work and it will return
This method will also work for floating point numbers.
How to convert a string to a number in JavaScript by dividing the string by the number 1Instead of multiplying by 1, you can also divide the string by 1. JavaScript is converting our string value to a number and then performing that mathematical operation.
How to convert a string to a number in JavaScript by subtracting the number 0 from the stringAnother method would be to subtract 0 from the string. Like before, JavaScript is converting our string value to a number and then performing that mathematical operation.
How to convert a string to a number in JavaScript using the bitwise NOT operator (~)The bitwise NOT operator ( If we use one bitwise NOT operator (
But if we use two bitwise NOT operators (
This method will not work for floating point numbers because the result would be an integer.
If you tried to use this method on non-numeric characters, then the result would be zero.
This method does have its limitations because it will start to break for values that are considered too large. It is important to make sure that your number is between the values of a signed 32 bit integer.
To learn more about the bitwise NOT operator ( How to convert a string to a number in JavaScript using the Math.floor() functionAnother way to convert a string to a number is to use the
Just like in earlier examples, if we tried to use non-numeric characters, then the result would be
How to convert a string to a number in JavaScript using the Math.ceil() functionThe
How to convert a string to a number in JavaScript using the Math.round() functionThe If I have the value
of 6.3, then
But if I changed that value to 6.5, then
ConclusionIn this article, I showed you 11 ways to convert a string to a number using JavaScript. Here are the 11 different methods discussed in the article.
I hope you enjoyed this article and best of luck on your JavaScript journey. Learn to code for free. freeCodeCamp's open source curriculum has helped more than 40,000 people get jobs as developers. Get started How do I convert letters to numbers in JavaScript?parseInt() #
The parseInt() method converts a string into an integer (a whole number). It accepts two arguments. The first argument is the string to convert. The second argument is called the radix .
How do you turn letters into numbers?The Letter-to-Number Cipher (or Number-to-Letter Cipher or numbered alphabet) consists in replacing each letter by its position in the alphabet , for example A=1, B=2, Z=26, hence its over name A1Z26 .
How do I convert a string to a number in JavaScript?How to convert a string to a number in JavaScript using the unary plus operator ( + ) The unary plus operator ( + ) will convert a string into a number. The operator will go before the operand. We can also use the unary plus operator ( + ) to convert a string into a floating point number.
How do I convert a string to a number in react?How To Convert String to Number In JavaScript. const num = Number('2020'); console. ... . node convert.js.. let year = "2020"; let iyear = parseInt(year, 10); console. ... . const pieStr = "3.14"; typeof pieStr "string" const pie = parseFloat(pieStr, 10); typeof pie "number". let result = +"2020"; typeof result "number". |