jquery converts a string to a number

1:parseint (String)

parseint ("1234blue"); Returns 1234

parseint ("123"); Returns 123

parseint ("22.5"); Returns 22

parseint ("Blue"); Returns NaN

In addition, the parseint () method has a base mode, which is the ability to convert binary, octal, hexadecimal, or any other binary string into integers. The base is specified by the second parameter of the parseint () method, as in the following example:

parseint ("AF", 16); Returns 175

parseint ("10", 2); Returns 2

parseint ("10", 8); Returns 8

parseint ("10", 10); Returns 10

If the decimal number contains a leading 0, it is best to use cardinality 10 so that the octal value is not unexpectedly obtained. For example:

parseint ("010"); Returns 8

parseint ("010", 8); Returns 8

parseint ("010", 10); Returns 10

2:parsefloat (): parsefloat () No base mode

Parsefloat ("1234blue"); Returns 1234.0

Parsefloat ("0xA"); Returns NaN

Parsefloat ("22.5"); Returns 22.5

Parsefloat ("22.34.5"); Returns 22.34

Parsefloat ("0908"); Returns 908

Parsefloat ("Blue"); Returns NaN

3: Number():

Number (false) 0

Number (TRUE) 1

Number (undefined) NaN

Number (NULL) 0

Number ("5.5") 5.5

Number ("56") 56

Number ("5.6.7") NaN

Number (new Object ()) NaN

Number (100) 100

Reference: http://www.angelweb.cn/Html/jquery/jqueryjiaocheng/2867.html

jquery converts a string to a number