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type is only two literals: true and false,true do not necessarily equal 1,false not necessarily equal to 0. Conversion rules for various data types and Boolean types Data type The value converted to true Value converted to False Boolean True False String Any non-empty string "" (empty string) Number Any non-0 numeric value (including infinity) 0

are objects, the second object is returned. Returns null if one of the operands is null. If an operand is Nan, a nan is returned. If an operand is undefined, an error occurs. 12 . The logical AND operator is represented by the double ampersand (). 13. The logical OR operator is represented by a double vertical bar (| | Said14, multiplication also has some special behavior: If the result is too large or too small, the resulting result is

been questioned. Will parallel lines intersect far and far away? No one has actually seen it. So "parallel lines, never intersect" just assume (everyone think of junior high school learning parallel axiom, is not proven). Since it is possible to assume that parallel lines never intersect, you can also assume that parallel lines intersect far and far away. That is, parallel lines intersect at Infinity Point p∞ (Please close your eyes, imagine that

basic of Modern algebra," "Elementary number Theory," such as books, it is best for you to turn first, which is helpful for you to understand this article. Don't be afraid, I try to make the language more popular, I hope this article can become a stepping stone to learn ECC.First, from parallel lines.Parallel lines, never intersect. No one doubts that: but in modern times this conclusion has been questioned. Will parallel lines intersect far and far away? No one has actually seen it. So "parall

straightness can be preserved. The results show that this is the most general requirement for mapping, and we can define a projective transformation of a plane as any mapping of points that maintain a straight line on a plane. To understand why we need projective geometry, we start with the familiar Euclidean geometry. This is the geometry that describes the angle and shape of the object. Euclidean geometry is a major problem-we need to constantly infer some basic concepts of geometry-such as t

understanding of the public key algorithm. "The foundation of Modern Algebra" "Elementary Number Theory" and other books, it is better for you to flip first, which is helpful for you to understand this article. Don't be afraid, I will try to make the language more popular, I hope this article can become a stepping stone to learn ECC. First, from the parallel line talk about. Parallel lines, never intersect. No one doubted: but in modern times the conclusion was questioned. Will parallel lines

relational operator--------"); Console.dir (16> "5"); Console.dir ("A" > "5"); Console.dir (5 Multiplication Console.dir (5* "5"); Console.dir (5* "a");//nan Console.dir (5*nan);//nan Console.dir (5*null); 0 Console.dir (5* undefined);//nan Console.dir (5*5);//25 Here are the multiplication implicit conversion principles: 1, if 2 numeric values are numbers, then direct multiplication, (I believe everyone will, and primary mathematics, as well as to pay attention to

*nan);//nan Console.dir (5*null); 0 Console.dir (5*undefined);//nan Console.dir (5*5);//25 Here are the multiplication implicit conversion principles: 1, if 2 numeric values are numbers, then direct multiplication, (I believe everyone will, and primary mathematics, as well as to pay attention to the number of symbols), if multiply charge number value than the ECMAScript range of numerical representation, Returns either Infinity