scuf infinity

cases, JavaScript will automatically convert the value into a scientific notation, and in other cases, it is represented directly in the literal form. 1. the number before the decimal point is 21 more digits. console.log(1234567890123456789012);// 1.2345678901234568e+21 console.log(123456789012365648787); //123456789012365660000　 2. The number of digits after the decimal point is greater than 5. console.log(0.0000006);//6e-7 console.log(0.000006); //0.000006 Value Range Due to memory limi

can use toString () to return any hexadecimal integer. var num = 10;alert(num.toString()); //"10"alert(num.toString(9)); //"11"alert(num.toString(16)); //"a" 3. Pay attention to NaN and Infinity when using bitwise operators. When the bitwise operator is used for NaN and Infinity, both values are treated as 0. If a bitwise operator is used for a non-numeric value, the Number () function is used to conver

. Don't be afraid. I try to make the language more popular. I hope this article will become a stepping stone for learning ECC. 1. Start with parallel lines. Parallel lines. No one is skeptical. :) However, this conclusion has been questioned in modern times. Will parallel lines interwork in distant places? In fact, no one has ever seen it. So "parallel lines, never intersection" is just a hypothesis (we think about the parallel principle of junior high school learning, there is no proof ). Now t

1. Additionvarbox=1+2 //3varbox=1+nan//nan, one for Nan is NanvarBox=infinity+infinity//InfinityvarBox=-infinity +-infinity//-infinityvarBox=infinity +-infinity//Nan, positive

Transfer from http://aikilis.tk/ If the scope of the data in the problem is clear, then the infinite setting is not a problem, in the ambiguous case, many programmers take 0x7fffffff as infinity, because this is the maximum value of 32-bit int. If this infinity is used only for general comparisons (such as the initial value of the min variable at the minimum), then 0x7fffffff is a perfect choice, but in mor

This article mainly introduces the mathematical operations in JavaScript. This article first explains some knowledge about mathematical operations, and then provides an example of operations. If you need a friend, you can refer to JavaScript, mathematical operations can be achieved through two operations: 1. +,-, *,/, %, and other operators.2. Use the computing functions of the Math object. For example, Math. pow (2, 3) is used to calculate the 3rd power of 2. Unlike Java, mathematical operat

Introduction to mathematical operations in JavaScript and mathematical operations in javascript In JavaScript, mathematical operations can be achieved through two operations: 1. +,-, *,/, %, and other operators.2. Use the computing functions of the Math object. For example, Math. pow (2, 3) is used to calculate the 3rd power of 2. Unlike Java, mathematical operations in JavaScript do not throw any errors. The overflow, Division by 0, and opening of negative numbers are legal. The results are s

GetValue (left). Let right explain the result of executing unaryexpression. Make Rightvalue the GetValue (right). Make Leftnum a Tonumber (leftvalue). Make Rightnum a Tonumber (rightvalue). Returns a specific operator (*,/, or%) Results that act on Leftnum and Rightnum 11.5.1 using the * operatorThe * operator represents multiplication and produces the product of the operand. The multiplication operation satisfies the commutative law. Because of the accuracy problem, mu

2.9.5. Addition OperatorsAddition operators (plus signs and minus signs) are usually the simplest operators. However, in ECMAScript, each addition operator has many special behaviors.1. Addition operators:Copy codeThe Code is as follows:Var iResult = 1 + 2;Console. log (iResult); // outputs 3 Special features:The number of operations is NaN and the result is NaN.Infinity and Infinity. The result is Infinity

2.JavaScriptJavaScript can only recognize integers (-2) from 53 to (2) 53.A. Numerical overflow:Data exceeds (2) 53 o'clock: expressed as infinity (positive infinity).Data is less than (-2) 53 o'clock: expressed as-infinity (negative infinity).B. Value underflow:The positive floating-point number is infinitely close t

In the previous minimum spanning tree problem encountered, I followed the previous habit of the INF defined as 1 billion, and then initialize the array to the maximum value, and then enter the connected path +value, the last value is still inf is not the case. But there is a problem here, the INF is defined as 1 billion, the last displayed array value is negative, finally changed to 0x3f3f3f3f finally solved. Today just see a related blog, so carefully analysis. Referenced from: http://blog.csdn

Several arithmetic operators are available in JavaScript, + (plus)-(minus) * (multiply)/(except)% (remainder), general usage is mathematically consistent, but special rules are also specified:Note: The way in which values are stored in JavaScript can be saved as positive 0 (+0) and negative 0 (-0), and positive zero and negative 0 are considered equal.Multiply sex operator (*):If the result is too large or too small, the resulting result is Infinity o

1. Infinity is infinitely smallBeginners should note that the infinity is the limit of 0 variables rather than the number 0, refers to the independent variable in a certain mode of change in the limit of 0, called a function is an infinite number, it is necessary to explain the change trend of the independent variable. For example, in the case of an infinite quantity, but not generally said to be infinitesi

This article from http://t.cn/zjyTuab If the range of data in the problem is clear, the infinite setting is not a problem. If it is not clear, many programmers take 0x7fffffff as the infinite, because this is the maximum value of 32-bit Int. If this infinity is only used for general comparison (for example, the initial value of the min variable when the minimum value is obtained), 0x7fffffff is indeed a perfect choice, but in more cases, 0x7fffffff is

type, and the return value is not necessarily a Boolean value: If one operation is an object and the other is a Boolean value, this object is returned. If both operations are objects, the first object is returned. If the number of operations is null, null is returned. If the number of operations is NaN, NaN is returned. An error occurs if the number of operations is undefined. The logic OR in ECMAScript is also a simple operation. If the first operation determines the result, the second operati

the corresponding variable has saved a reference to an objectThe value of the undefined that is derived from the null value.The equality operator (true) between undefined and null is the main purpose: to convert its operandsUndefined when there is no need to display a variable, and there is no time to initialize obj, the computer givesBoolean:true (not necessarily 1), false (not necessarily 0)var t1=true;var F1=false;Use the Boolean (obj) function to cast obj to a Boolean value, and the returne

Original: Learn JavaScript from the beginning (v)--operator (ii)One, multiplicative sex operator1. Multiplication: *Some special rules for multiplication operators: If the operand is a numeric value, it is calculated by normal multiplication, and if the product exceeds the representation range of the ECMAScript value, it returns infinity or-infinity If one of the operands is Nan, the return res

One, multiplicative sex operator1. Multiplication: *Some special rules for multiplication operators: If the operand is a numeric value, it is calculated by normal multiplication, and if the product exceeds the representation range of the ECMAScript value, it returns infinity or-infinity If one of the operands is Nan, the return result is Nan If infinity