define nan

This paper summarizes the meaning, generation and judging methods of Nan and INF in C language. Nan in the C language means not a number, which is equivalent to #IND: indeterminate (Windows) generates:An undefined operation was performed on a

0. GreetingTurn over their own blog, the last one is June 26, said the update? Review just past this July, all day is the company's induction training plus their own small papers, every day to fight to 1 o'clock in the morning more, this is to hang

Original source: http://blog.csdn.net/oscar999/article/details/9353713JS data type before you introduce the differences between the three, take a look at the JS data type. In a language like Java, C, before using a variable, you need to define the

Before introducing the differences between the three JS data types, let's take a look at the JS data types. In a language such as Java and C, before using a variable, you must first define the variable and specify its data type, which is an integer,

PHP uses the Define () function to define a constant. The so-called constant refers to the value of the amount of constant, this article collects a few about the PHP constants of the article, I hope that you understand the PHP constants help, come

Chapter III Basic Concepts Everything in ECMAScript (variables, function names, and operators) is case-sensitive. Identifiers are the names of variables, functions, attributes, or parameters of a function. The constituent rules for

1. Non-numeric type conversion value Number()When using transformations: Undefined will be Nan. If the string starts with 0, the browser ignores the leading 0 and does not convert according to the octal system If the string starts at

About the multi-dimensional array, [["name"=>"zs","age"=>"10","sex"=>"nan"],["name"=>"ls","age"=>"11","sex"=>"nan"],["name"=>"ww","age"=>"12","sex"=>"nv"]], [["name"=>"zs","age"=>"10","sex"=>"nan"],["name"=>"ls","age"=>"11","sex"=>"nan"],["name"=>

3.1 Syntax 3.1.1 Case sensitiveEverything in ECMAScript (variables, function names, and operators) is case-sensitive.3.1.2 IdentifierRefers to the name of a variable, function, property, or parameter of a function.Formatting rules:The first

Directory 1. What is a floating point number? 2. IEEE floating point number 3. Transformation between a real number and a floating point number 4. Special values 4.1. Nan 4.2. Infinite