Learn Javascript Visually by Ivelin Demirov PDF

By Ivelin Demirov

Fantastically Illustrated ebook that teaches javascript basics trough metaphors, analogies and simple step by step routines. visible freshmen keep info very another way than their left brained counter-parts, and hence make the most of assorted techniques. complete colour illustrations support reminiscence triggers as your mind by no means forgets a picture, metaphor or schema. One web page of a visible consultant can equivalent one bankruptcy of a traditional publication as illustrations could make an international of distinction over strictly phrases on a web page!

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The *= Operator: Multiply AND assignment operator; it multiplies the right operand with the left operand and assign the result to the left operand. C *= A is equivalent to C = C * A. The /= Operator: Divides AND assignment operator; It divides left operand with the right operand and assigns the result to the left operand. C /= A is equivalent to C = C / A. The %= Operator: Modulus AND assignment operator; It takes modulus by using two operands and assign the result to the left operand. C %= A is equivalent to C = C % A.

You get Blue164. JavaScript also has DYNAMIC TYPES. This means that the same variable can be used as more than one type, as you can see below. 1. var x; 2. var x = 5; 3. var x = "John"; // x is undefined. // Now x is a Number. // Now x is a String. Exercise: 7 Data types. html Variables. 1. 2. 3. 4. 5. //this variable is declared with a name but //undefined as value var box; //null is an object var box2 = null; 1. 2. 3. 4. 5. 6. 7. 8. 9. //our variables have new values //'box' is now initialized with the number 26, //'box2' is not null anymore var box = 26; var box2 = 24; //assign the same value to 2 different //variables by separating them with comma var box2 = 24, box3 = 24; 1.

JavaScript ignores multiple spaces and tabs //those are the same. The first space is required varwhiteSpace ="empty"; var whiteSpace = //white spaces are preserved in strings var strings = "preservemyformat"; "empty"; Code blocks 1. 2. 3. 4. 5. 6. //functions are examples of code blocks //or any group of statements delimited by braces functionmyFunction () { var a = 3; alert ("my group" + a); } Statements are commands that are executed one by one in the same order they are written, unless they are conditional statements.

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Learn Javascript Visually by Ivelin Demirov


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