The same goes for the other way around converting a string to a number. Converting string to number as with the previous shown methods javascript also provides functions to easily transform a string to a primitive number.
Check If Variable Is A Number In Javascript Mkyong Com
Javascript string to number. Javascript provides various ways to convert a string value into a number. The number constructor contains constants and methods for working with numbers. It attempts to convert any value to a number. Number is the javascript number constructor called as a function which performs a type conversion. Use the number object. If the parameter is a date object the number function returns the number of milliseconds since midnight january 1 1970 utc.
Values of other types can be converted to numbers using the number function. The javascript number type is a double precision 64 bit binary format ieee 754 value like double in java or c. It uses the string and number constructor to cast the string to a number and back again and thus checks if the javascript engines perfect minimal form the one it got converted to with the initial number constructor matches the original string. The best one in my opinion is to use the number object in a non constructor context without the new keyword. This means it can represent fractional values but there are some limits to what it can store. False becomes 0 true becomes 1.
The number function converts the object argument to a number that represents the objects value. Converting a number to a string javascript convert number to string is a common and simple operation. If the value cannot be converted to a legal number nan is returned.
Gallery of Javascript String To Number
