Javascript Built-in Functions

Like any other scripting language Javascript also has its own built in functions. These built in functions also known as global functions.

The beauty of these function are, you can use these function with any Javascript built in object such as String , Number, Date, RegExp, Array, Boolean and Math. Javascript's all built in object support these functions.

Javascript Built in Functions

Here is a list of built in functions with description.

FunctionDescription
isNaNThis function is intended to determines whether value is a legal number or not.
isFiniteThis function is intended to find whether a number is a finite legal number.
evalThis function is intended to execute Javascript source code.
numberThis function is intended to converts object to the corresponding number value.
stringThis function is intended to converts object to the corresponding string value.
parseIntThis function is intended to converts string value to integer.
parseFloatThis function is intended to converts string value to floating point number.
escapeThis function is intended to encodes the string value into world wide acceptable format.
encodeURIThis function is intended to encode URI.
decodeURIThis function is intended to decode URI.
encodeURIComponentThis function is intended to encode URI component.
decodeURIComponentThis function is intended to decode URI component.

In order to understand each filter, click on any filter listed in the above table.

See Also

Javascript Built in String Object
Javascript Built in Number Object
Javascript Built in Math Object
Javascript Built in Date Object
Javascript Built in Arrays Object
Javascript Built in Boolean Object
Javascript Built in RegExp Object
Javascript Built in JSON Object


 
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