JavaScript Simple Projects Fraction Calculator?Ī fraction calculator is a tool used to perform mathematical operations such as addition, subtraction, multiplication, and division on fractions. If you are a beginner and want to learn javascript from basic, please check out our other JavaScript Simple Projects With Source Code This project is an excellent way to learn about basic JavaScript syntax, data types, and functions while practicing your math skills.Īlso, we will provide you with the source codeso that you can customize the code to gain the necessary skills to create your own projects and become proficient in JavaScript. This calculator will take a decimal number as input and then perform the calculation to show the result in its simplest form. In this project, you'll learn how to create a simple fraction calculator in JavaScript. One of the excellent simple projects for beginners is a fraction calculator, which involves basic mathematical operations such as addition, subtraction, multiplication, and division of fractions. In my case, * 1 is the winner performance-wise 10x faster than other alternatives.As a beginner, you can learn javascript by building simple JavaScript projects. Generally one of the fastest options, behaves like the + unary operator, so it does not perform conversion to an integer if the number is a float. Similar to the + unary operator, but returns the integer part, is to use Math.floor(): Math. See how it returns NaN in the first example, which is the correct behavior: it’s not a number. Its parseInt() sibling, it only takes one argument – the string to convert: parseFloat ( '10,000' ) //10 ❌ parseFloat ( '10.00' ) //10 ✅ (considered decimals, cut) parseFloat ( '10.000' ) //10 ✅ (considered decimals, cut) parseFloat ( '10.20' ) //10.2 ✅ (considered decimals) parseFloat ( '10.81' ) //10.81 ✅ (considered decimals) parseFloat ( '10000' ) //10000 ✅ Use + If you want to retain the decimal part and not just get the integer part, use parseFloat(). ParseInt() tries to get a number from a string that does not only contain a number: parseInt ( '10 lions', 10 ) //10īut if the string does not start with a number, you’ll get NaN (Not a Number): parseInt ( "I'm 10", 10 ) //NaNĪlso, just like Number it’s not reliable with separators between the digits: parseInt ( '10,000', 10 ) //10 ❌ parseInt ( '10.00', 10 ) //10 ✅ (considered decimals, cut) parseInt ( '10.000', 10 ) //10 ✅ (considered decimals, cut) parseInt ( '10.20', 10 ) //10 ✅ (considered decimals, cut) parseInt ( '10.81', 10 ) //10 ✅ (considered decimals, cut) parseInt ( '10000', 10 ) //10000 ✅ Other solutions Use parseInt() and parseFloat()Īnother good solution for integers is to call the parseInt() function: const count = parseInt ( '1234', 10 ) //1234ĭon’t forget the second parameter, which is the radix, always 10 for decimal numbers, or the conversion might try to guess the radix and give unexpected results. In the case you need to parse a string with decimal separators, use Intl.NumberFormat instead. If we use the constructor ( new Number("1234")) it returns us a Number object instead of a number value, so pay attention. Number is a wrapper object that can perform many operations. The best one in my opinion is to use the Number object, in a non-constructor context (without the new keyword): const count = Number ( '1234' ) //1234 JavaScript provides various ways to convert a string value into a number. Learn how to convert a string to a number using JavaScript
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