Javascript has many pre-defined functions and functions which are used extensively are<\/p>\n
Conversion and Comparison<\/strong> \u2013 Functions used for data conversion and comparison<\/p>\n escape(string)<\/u> – Encodes a string from ASCII into an ISO Latin-1 (ISO 8859-1) character set for HTML processing. It is passed the string to be encoded, and returns the encoded string.<\/p>\n unescape<\/u> – Converts an ISO8859-1 character set to ASCII.<\/p>\n eval()<\/u>– Converts a string to integer or float value.<\/p>\n isNaN(value)<\/u> – If the value passed is a not a number, the boolean value of true is returned, if it is a number, it returns false.<\/p>\n parseFloat()<\/u> – Returns floating point numbers the same as the parseInt function, but looks for floating point qualified strings and returns their value as a float.<\/p>\n parseInt()<\/u>– Converts a string to an integer returning the first integer encountered which is contained in the string. If no integer value are found such as in the string “abcd”, then a value of 0 is returned.<\/p>\n typeof<\/u> operator – This operator returns the type of the object it operates on. Values returned are string values and may be one of “undefined”, “object”, “function”, “number”, “Boolean”, or “string”.<\/p>\n <\/p>\n