The simplest way would be to use the native Number function: · var x = Number("1000") · If that doesn't work for you, then there are the parseInt, unary plusparseFloat with floor, and Math.round methods. · parseInt() · var x = parseInt("1000", 10); // You want to use radix 10 // So you get a decimal number even with a leading 0 and an old browser ([IE8, Firefox 20, Chrome 22 and older][1]) · Unary plus · If your string is already in the form of an integer: · var x = +"1000"; · floor() · If your string is or might be a float and you want an integer: · var x = Math.floor("1000.01"); // floor() automatically converts string to number · Or, if you're going to be using Math.floor several times: · var floor = Math.floor; var x = floor("1000.01"); · parseFloat() · If you're the type who forgets to put the radix in when you call parseInt, you can use parseFloat and round it however you like. Here I use floor. · var floor = Math.floor; var x = floor(parseFloat("1000.01")); · round() · Interestingly, Math.round (like Math.floor) will do a string to number conversion, so if you want the number rounded (or if you have an integer in the string), this is a great way, maybe my favorite: · var round = Math.round; var x = round("1000"); // Equivalent to round("1000", 0) Answer from Nosredna on google.com
Better Programming
betterprogramming.pub › what-is-the-best-way-to-convert-a-string-to-a-number-in-javascript-67052a1706c6
The Best Way to Convert a String to a Number in JavaScript
March 6, 2020 - The parse methods, as the name suggests, attempt to parse through a string piece-by-piece as they convert it, Number() attempts to convert the entire string argument into a number, all at once. const str = '123abc'; Number(str); // NaN (attempts to convert entire string, cannot) parseInt(s); // 123 (stops as soon as it hits `a`) Number() is the JavaScript Number constructor called as a function, which performs a type conversion.
W3Schools
w3schools.com › jsref › jsref_parseint.asp
JavaScript parseInt() Method
The parseInt method parses a value as a string and returns the first integer. A radix parameter specifies the number system to use: 2 = binary, 8 = octal, 10 = decimal, 16 = hexadecimal. If radix is omitted, JavaScript assumes radix 10.
How can I convert a string to an integer in JavaScript? - Stack Overflow
So if you have noticed parseInt ... suitable if you want to retain the values after decimals. Use parseInt if and only if you are sure that you want the integer value. ... The question was "How do I convert a String into an integer in javascript" 2015-09-02T14:08:16.3... More on stackoverflow.com
What is the method for transforming a string into an integer using JavaScript?
I am looking for a way to change a string representation of a number into an actual integer in JavaScript. What techniques or functions can I use to achieve this? More on community.latenode.com
0
September 29, 2024The unary + operator is a shortcut to convert a string into a number 🤩
Neat. Don't do this. More on reddit.com
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999
March 31, 2018Javascript hash functions to convert string into integer hash
2.4M subscribers in the javascript community. Chat about javascript and javascript related projects. Yes, typescript counts. Please keep self… More on reddit.com
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June 6, 2010How to get only int value from string in JavaScript?
Use parseInt() to extract the leading integer from a string. If the string contains other characters, parseInt() will stop parsing when it encounters a non-numeric character.
upgrad.com
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Convert String to int in JavaScript
How to convert string to int without using parseInt JavaScript?
You can use the number() constructor which carries out JavaScript convert string to integer (integer or float if decimals are present). You can also use the unary plus operator (+) which converts string to a number type.
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Convert String to int in JavaScript
How to check if string can be converted to int JavaScript?
Use the isNaN() function in combination with parseInt(). If isNaN(parseInt(yourString)) returns true, the string can't be reliably converted to an integer.
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Convert String to int in JavaScript
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MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › parseInt
parseInt() - JavaScript | MDN
The parseInt function converts its first argument to a string, parses that string, then returns an integer or NaN. If not NaN, the return value will be the integer that is the first argument taken as a number in the specified radix. (For example, a radix of 10 converts from a decimal number, ...
W3Schools
w3schools.com › jsref › jsref_tostring_number.asp
JavaScript Number toString() Method
The toString() method is used by JavaScript when an object needs to be displayed as a text (like in HTML), or when an object needs to be used as a string.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Number › parseInt
Number.parseInt() - JavaScript | MDN
The Number.parseInt() static method parses a string argument and returns an integer of the specified radix or base. function roughScale(x, base) { const parsed = Number.parseInt(x, base); if (Number.isNaN(parsed)) { return 0; } return parsed * 100; } console.log(roughScale(" 0xF", 16)); // ...
Built In
builtin.com › articles › javascript-string-to-a-number
How to Convert a JavaScript String to Number | Built In
I prefer to use the Number() method because it’s easier for developers to read the code, and it’s quite intuitive to realize that it’s converting a string to Number. Performance chart rating each method to convert a javascript string to a number.
Top answer 1 of 16
3114
The simplest way would be to use the native Number function: · var x = Number("1000") · If that doesn't work for you, then there are the parseInt, unary plusparseFloat with floor, and Math.round methods. · parseInt() · var x = parseInt("1000", 10); // You want to use radix 10 // So you get a decimal number even with a leading 0 and an old browser ([IE8, Firefox 20, Chrome 22 and older][1]) · Unary plus · If your string is already in the form of an integer: · var x = +"1000"; · floor() · If your string is or might be a float and you want an integer: · var x = Math.floor("1000.01"); // floor() automatically converts string to number · Or, if you're going to be using Math.floor several times: · var floor = Math.floor; var x = floor("1000.01"); · parseFloat() · If you're the type who forgets to put the radix in when you call parseInt, you can use parseFloat and round it however you like. Here I use floor. · var floor = Math.floor; var x = floor(parseFloat("1000.01")); · round() · Interestingly, Math.round (like Math.floor) will do a string to number conversion, so if you want the number rounded (or if you have an integer in the string), this is a great way, maybe my favorite: · var round = Math.round; var x = round("1000"); // Equivalent to round("1000", 0)
2 of 16
306
Try parseInt function: · var number = parseInt("10"); · But there is a problem. If you try to convert "010" using parseInt function, it detects as octal number, and will return number 8. So, you need to specify a radix (from 2 to 36). In this case base 10. · parseInt(string, radix) · Example: · var result = parseInt("010", 10) == 10; // Returns true var result = parseInt("010") == 10; // Returns false · Note that parseInt ignores bad data after parsing anything valid. This guid will parse as 51: · var result = parseInt('51e3daf6-b521-446a-9f5b-a1bb4d8bac36', 10) == 51; // Returns true
Top answer 1 of 16
3114
The simplest way would be to use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt()
var x = parseInt("1000", 10); // You want to use radix 10
// So you get a decimal number even with a leading 0 and an old browser ([IE8, Firefox 20, Chrome 22 and older][1])
Unary plus
If your string is already in the form of an integer:
var x = +"1000";
floor()
If your string is or might be a float and you want an integer:
var x = Math.floor("1000.01"); // floor() automatically converts string to number
Or, if you're going to be using Math.floor several times:
var floor = Math.floor;
var x = floor("1000.01");
parseFloat()
If you're the type who forgets to put the radix in when you call parseInt, you can use parseFloat and round it however you like. Here I use floor.
var floor = Math.floor;
var x = floor(parseFloat("1000.01"));
round()
Interestingly, Math.round (like Math.floor) will do a string to number conversion, so if you want the number rounded (or if you have an integer in the string), this is a great way, maybe my favorite:
var round = Math.round;
var x = round("1000"); // Equivalent to round("1000", 0)
2 of 16
306
Try parseInt function:
var number = parseInt("10");
But there is a problem. If you try to convert "010" using parseInt function, it detects as octal number, and will return number 8. So, you need to specify a radix (from 2 to 36). In this case base 10.
parseInt(string, radix)
Example:
var result = parseInt("010", 10) == 10; // Returns true
var result = parseInt("010") == 10; // Returns false
Note that parseInt ignores bad data after parsing anything valid.
This guid will parse as 51:
var result = parseInt('51e3daf6-b521-446a-9f5b-a1bb4d8bac36', 10) == 51; // Returns true
upGrad
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Convert String to int in JavaScript
February 3, 2025 - Let us learn how to convert string to int in javascript with different methods and why it is important to do so in this tutorial.
Fonzi AI
fonzi.ai › blog › convert-string-to-integer
How to Convert a String to an Integer (in Python, JavaScript ...
August 12, 2025 - Join Fonzi to get multiple salary-backed offers from top tech companies. One application. Curated opportunities and concierge support.
Mikesallese
mikesallese.me › blog › javascript-to-int
Converting a string to an integer in Javascript
Simple example of converting a string to an integer in Javascript.
GreatFrontEnd
greatfrontend.com › questions › quiz › how-do-you-convert-a-string-to-a-number-in-javascript
How do you convert a string to a number in JavaScript? | Quiz Interview Questions with Solutions
September 5, 2021 - The parseInt() function parses a string and returns an integer. It can also take a second argument, the radix (base) of the numeral system to be used.
Latenode
community.latenode.com › other questions › javascript
What is the method for transforming a string into an integer using JavaScript? - JavaScript - Latenode Official Community
September 29, 2024 - I am looking for a way to change a string representation of a number into an actual integer in JavaScript. What techniques or functions can I use to achieve this?
W3Schools
w3schools.com › js › js_type_conversion.asp
JavaScript Type Conversions
The global method Number() converts a variable (or a value) into a number. A numeric string (like "3.14") converts to a number (like 3.14).
OneCompiler
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[Javascript] What is the way to convert a string to an integer? - Questions - OneCompiler
I want to convert a string to an integer, How can I do that in JavaScript? 4 years ago by Jahaan · You can either use Number() function or parseInt() function is used to convert a string to an integer in Javascript ·
Google
google.com › goto
parseInt() - JavaScript - MDN - Mozilla
July 8, 2025 - The parseInt function converts its first argument to a string, parses that string, then returns an integer or NaN. If not NaN, the return value will be the integer that is the first argument taken as a number in the specified radix. (For example, a radix of 10 converts from a decimal number, ...
Google
google.com › javascript › convert-a-string-to-an-integer-in-javascript
Convert a String to an Integer in JavaScript
July 11, 2025 - The number() method converts a string into an integer number. It works similarly to the unary plus operator.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Number › toString
Number.prototype.toString() - JavaScript | MDN
The toString() method of Number values returns a string representing this number value. function hexColor(c) { if (c < 256) { return Math.abs(c).toString(16); } return 0; } console.log(hexColor(233)); // Expected output: "e9" console.log(hexColor("11")); // Expected output: "b" ... An integer ...
Oreate AI
oreateai.com › blog › mastering-string-to-integer-conversion-in-javascript › 190420612cc4bf7e5db5180dc08ff6e6
Mastering String to Integer Conversion in JavaScript - Oreate AI Blog
December 31, 2025 - This method works seamlessly for straightforward cases but returns NaN (Not-a-Number) if the conversion fails—like trying to convert non-numeric strings such as 'Hello'. Another popular approach involves using parseInt(), which specifically parses strings and extracts integers: