It is essential to know at least three of them when working in JavaScript as they sometimes come in very handy, enhancing the flexibility and usability of your code. In this article, we discussed various techniques to convert a number to a string in JavaScript. const quantity '10.5' console. JavaScript is converting our string value to a number and then performing that mathematical operation. You can now check t another tutorial if you are curious about how to convert string to number. Instead of multiplying by 1, you can also divide the string by 1. One can choose the method that best suits the needs according to these factors. Decimal Precision: If you need to control the number of decimal places, the toFixed() method is a suitable choice.Readability: String interpolation and concatenation with an empty string are highly readable and make the code more expressive.Performance: Concatenation with an empty string and template strings tend to be faster and hence show better performance.We have to consider the specific requirements of a project while choosing a method for conversion. Note that toFixed() returns a string representation of the number, not a rounded number value. We rounded down the floating point number to 2 decimal places by passing 2 as a parameter in the toFixed() function and finally stored the string obtained from the function in a variable. This function will determine, based on the string parsed, whether to return an. The Number() constructor can be used to parse a string into a number too. We have used the toFixed() method to convert a floating point number to a string. Also, like previous methods shown, be sure to use the isNaN method to double check the parse compeleted successfully and you didn’t get a NaN (not a number) result. Num: variable representing the number that has to be converted to stringĭecimal_places: a number that represents the decimal places by which the floating point number has to be rounded. Syntax of toFixed() Function is as follows: let convertedStr = num.toFixed(decimal_places)ĬonvertedStr: variable to store the string that we get from the toFixed() function. This method rounds the number to the specified precision and returns it as a string. But, this method is primarily used when you need to convert a number to a string with a specific number of decimal places. The toFixed() method is another method of converting a number to a string. The method works with both integers and floating-point numbers. printing and checking type of convertedStr variableĬonsole.log(convertedStr + " " + typeof(convertedStr)) printing and checking the type of numFloat variableĬonsole.log(numFloat + " " + typeof(numFloat)) Let us understand with the help of an example. The String() parameter would simply convert the number to a string in whichever form it is passed. Server will render required table and client will replace old HTML with new one (received from server). The difference between the toString() function and the String() constructor is that the toString() method can convert the number into different decimal forms and then to a string, i.e. Of course, for every confirmed change (click on button) just post an AJAX request. It takes any value or variable as the parameter and converts it into a string. Step 5 Use isNumber () function to check, if the given value is of type Number it will return true, otherwise it will return false. Step 4 Use parseInt () function to convert the given String to Number. String() is a constructor of the class String. Step 3 Create the angular module and controller, define the variable inside it as given in below example. We passed various radices and stored the obtained strings in different variables which are printed on the console. In this example, we have used the toString() function to convert the number 9 to a string. printing and checking type of convertedStr variablesĬonsole.log(convertedStrBin + " " + typeof(convertedStrBin)) Ĭonsole.log(convertedStrOct + " " + typeof(convertedStrOct)) Ĭonsole.log(convertedStrDec + " " + typeof(convertedStrDec)) Ĭonsole.log(convertedStrHex + " " + typeof(convertedStrHex)) using the toString() method with different radices The default is 10.//printing and checking the type of num variable Radix(optional): can be 2(binary), 8(octal), 10(decimal), or 16(hexadecimal) according to the requirement. Syntax of parseInt() Function: let num = parseInt(value, radix) We can also convert it to a number by using the parseInt() and parseFloat() functions. 2) Using parseInt() and parseFloat() Functions NaN is basically a number that is not logically or legally a Number. printing the "num" variable and it's typeĪs the character string does not correspond to any number, we get the output as “NaN” which means “Not-a-Number”. printing the "str" variable and it's type
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