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float is a reserved keyword of JavaScript; reserved words cannot be used as variables, labels or function names. Some reserved words are used as JavaScript extensions in the future, and the float() function can parse a string by setting the float reserved word. , and returns a floating point number.
The operating environment of this tutorial: Windows 10 system, JavaScript version 1.8.5, Dell G3 computer.
float is a reserved keyword in JavaScript
Reserved keywords in Javascript cannot be used as variables or labels or function name. Some reserved keywords are used by Javascript for future extensions.
float:Float() function can parse a string and return a floating point number
The reserved words are as follows:
are represented as follows:
Reserved words do not have any specific purpose, but they are likely to be used as keywords in the future, so reserved words generally cannot be used as identifiers.
abstract
: abstract (abstract) modifier, which can modify classes and methods
boolean:
Object is used to convert non-Boolean values to Boolean Value
byte
: byte
char
: Definition of character variable
class
: Definition "Class"
const
: Declare a read-only constant. Once declared, the value of the constant cannot be changed
debugger:debugger
statement is used Stops execution of JavaScript and calls (if available) debugging functions.
double
:(double precision floating point type
enum
: enumeration
export
: You can export a module, which can be a variable or method
extends
: Used to create a subclass of an ordinary class or a built-in object.
final
: Keywords used for modification
float:Float
() function can parse a string and return a floating point number
goto
: Unconditional transfer statement
implements
: Method that implements the corresponding interface
import
: Used to import a binding exported by another module
int
: It is a function that rounds a value down to the nearest integer
interface
: It is the key to interface operations in object-oriented programming languages. Word, the function is to combine the required members to encapsulate a set of certain functions
long
: Represents a long integer data, which is a basic data in programming languages Type, the abbreviation of long int, the default is signed long
native
: It is a way to escape the native objects of the mobile operating system
package
: The Packages attribute is the root of all packages known to the Java interpreter
private
: Internal variable private; @private tag marks identifier as private
protected
: Create utility function
public
: Global variable
short
: Short integer
#static:static are called static variables or class variables
super:super() function is a method used to call the parent class (super class)
synchronized: Instance object lock
throws: Throwing exceptions to the caller allows the program to continue executing
transient: A mechanism for persisting object instances
volatile: .volatile is used as an instruction keyword to ensure that this instruction will not be optimized by the compiler And omit it, and require direct reading of the value each time
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