Javascript parseInt() Function with Examples - Converting Strings to Integers

The JavaScript parseInt() function parses a string and returns the first integer in a string.

There are two arguments one of which is mandatory string argument that is the string which is parsed to return the integer. The other argument is the optional radix argument that specifies the base of the integer and can range from 2 to 36. For example, 16 is the hexidecimal base (0123456789ABCDEF).

If no radix argument is provided or if it is assigned a value of 0, the function tries to determine the base:

• If the string begins with "0x", the radix is 16 (hexadecimal)
• If the string begins with "0", the radix is 8 (octal). This feature is deprecated
• If the string begins with any other value, the radix is 10 (decimal)

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