Introduction to the JavaScript Number() Constructor
The JavaScript Number() constructor is an object that allows you to create a number object from a literal value, a decimal, a binary, or an octal. This constructor is used to convert a value, either a string or a number, into a number object. It can also be used to represent infinity, not-a-number (NaN), and special numerical values.
Syntax of the JavaScript Number() Constructor
The syntax for the JavaScript Number() constructor is as follows:
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Number([value])
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The parameter value can be an integer, a float, a string, or a Boolean. If no value is given, then the result will be 0.
Examples of the JavaScript Number() Constructor
Let’s look at some examples of using the JavaScript Number() constructor.
To create a number object from an integer, use the following syntax:
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var x = new Number(20);
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To create a number object from a float, use the following syntax:
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var y = new Number(3.14);
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To create a number object from a string, use the following syntax:
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var z = new Number("100");
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To create a number object from a Boolean, use the following syntax:
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var a = new Number(true);
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To create a number object from infinity, use the following syntax:
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var b = new Number(Infinity);
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To create a number object from not-a-number (NaN), use the following syntax:
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var c = new Number(NaN);
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Conclusion
In this tutorial, we discussed the JavaScript Number() constructor. We covered the syntax of the constructor and the different ways to create a number object from a literal value, a decimal, a binary, or an octal. We also discussed how to represent infinity, not-a-number (NaN), and special numerical values using the constructor.
