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Add Operator.html and Operator_js.js with arithmetic, comparison, and logical operators examples; Add Variables.html demonstrating variable declarations and usage
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‎Lectures/Day02/Operator/Operator.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script src="Operator_js.js"></script>
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</head>
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<body>
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</body>
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</html>

‎Lectures/Day02/Operator/Operator_js.js‎

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// Arithmetic Operators:
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// + (Addition)
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// - (Subtraction)
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// * (Multiplication)
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// / (Division)
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// % (Modulus, returns the remainder)
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// ++ (Increment by 1)
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// -- (Decrement by 1)
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x = 345
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y = 67
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console.log(x+y);
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console.log(x-y);
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console.log(x*y);
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console.log(x/y);
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console.log(x%y);
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console.log(++x);
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console.log(--y);
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// Comparison Operators:
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// == (Equal to)
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// != (Not equal to)
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// === (Strict equal to)
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// !== (Strict not equal to)
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// > (Greater than)
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// < (Less than)
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// >= (Greater than or equal to)
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// <= (Less than or equal to)
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x = 34
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y = 67
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console.log(x==y)
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console.log(x!=y)
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console.log(x>y)
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console.log(x<y)
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console.log(x<=34)
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console.log(x>=34)
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console.log(34 !== '34')
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// Logical Operators:
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// && (Logical AND)
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console.log((x<y) && (x==304));
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// || (Logical OR)
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console.log((x<y) || (x==340));
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// ! (Logical NOT)
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console.log(!(x<y));

‎Lectures/Day02/Variables.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<script>
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document.write("welcome","<br>");
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let data = 34;
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document.write(data,"<br>")
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var number = 900;
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document.write(number,"<br>");
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number = 90
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document.write(number,"<br>");
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const num = 890;
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document.write(num,"<br>")
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num = 89; // to constant variable.
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document.write(num,"<br>")
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</script>
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</body>
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</html>

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