(I) the mandatory conversion
1. definitions : refers to a data type cast to other data types
Mainly refers to the type of conversion, the other types of data, converted to a String, Number, Boolean
(Ii) to convert other data types for other hex numbers
1. JS, if necessary represents a hexadecimal number, it is necessary to 0x beginning
If you need to represent octal numbers, you need to 0 at the beginning
If you need to represent binary numbers, you need to 0b beginning, but not all browsers support
Specific examples:
It indicates hexadecimal numbers
Represent octal numbers
Represent binary numbers
2. to "070" this string , some browsers as octal resolved, some will be resolved as a decimal
Google Chrome
IE 8 browser
3 may be the parseInt () passing a second parameter to the specified number hexadecimal
Octal
Converted to decimal
(Iii) converting the other data type Boolean type
Using Boolean () function
- Digital ----> Boolean
- In addition to 0 and NaN , the rest are true
- string ----> Boolean
- In addition to the empty string , the rest are true
- null and undefined are converted to false
- the object will be converted to true
Specific examples:
- Digital ----> Boolean
Digital 123; true
Digital -456; true
Digital 0; false
Indinity ; true
NaN; false
- string ----> Boolean
"hello" ; true
"true" ; true
"false" ; true
"Error"; true
"" Empty string; to false
"" Space; true
- null and undefined are converted to false
null ； false
undefined ； false
These are the mandatory conversion of all content, want to help.