Write HTML Programs to design different geometrical shapes using Canvas and SVG

<div class="d1">
            <svg width="400" height="100">
                <circle cx="50" cy="50" r="50" fill="purple"/>
            </svg>
            <hr>
            <svg width="400" height="150">
                <rect width="300" height="150" style="fill:rgb(0, 238, 255);stroke-width:5;stroke:rgb(0,0,0)" />
            </svg>
            <hr>
            <svg width="400" height="180">
                <rect x="50" y="20" rx="20" ry="20" width="150" height="150"
                style="fill:red;stroke:black;stroke-width:5;opacity:0.5" />
            </svg>
            <hr>
            <svg width="300" height="200">
                <polygon points="100,10 40,198 190,78 10,78 160,198"
                style="fill:rgb(234, 255, 4); stroke:rgb(255, 0, 0);stroke-width:5;" />
            </svg>
        </div>
        <canvas id="myCanvas" width="200" height="100" style="border:1px solid #d3d3d3;">
            Your browser does not support the HTML canvas tag.</canvas>
           
            <script>
            var c = document.getElementById("myCanvas");
            var ctx = c.getContext("2d");
            ctx.moveTo(0,0);
            ctx.lineTo(200,100);
            ctx.stroke();
        </script>

Program to design form using HTML5 elements, attributes and Semantics tags and apply HTML5 validation to it

 <html>

  <head>
    <title>HTML5 Form</title>
  </head>
  <body>
    <h1>HTML5 Form</h1>

    <form action="#" method="post">
      <div>
        <label for="name">Name:</label>
        <input type="text" id="name" name="name" required />
      </div>

      <div>
        <label for="email">Email:</label>
        <input type="email" id="email" name="email" required />
      </div>

      <div>
        <label for="age">Age:</label>
        <input type="number" id="age" name="age" min="18" max="100" required />
      </div>

      <div>
        <label for="gender">Gender:</label>
        <select id="gender" name="gender" required>
          <option value="">-- Select --</option>
          <option value="male">Male</option>
          <option value="female">Female</option>
          <option value="other">Other</option>
        </select>
      </div>

      <div>
        <label for="message">Message:</label>
        <textarea id="message" name="message" required></textarea>
      </div>

      <div>
        <input type="submit" value="Submit" />
      </div>
    </form>
  </body>
</html>

Implement Transformation using Translation, Rotation and Scaling in your web page.
 <html>

<head>
    <title>Transformation Demo</title>
    <style>
        #myElement {
            width: 100px;
            height: 100px;
            background-color: red;
            transition: transform 0.3s ease;
        }
    </style>
</head>
<body>
    <div id="myElement"></div>
    <button onclick="translate()">Translate</button>
    <button onclick="rotate()">Rotate</button>
    <button onclick="scale()">Scale</button>

    <script src="Q7.js"></script>
</body>
</html>
unction translate() {
    var element = document.getElementById("myElement");
    element.style.transform = "translate(50px, 50px)";
}

function rotate() {
    var element = document.getElementById("myElement");
    element.style.transform = "rotate(45deg)";
}

function scale() {
    var element = document.getElementById("myElement");
    element.style.transform = "scale(1.5)";
}


Program to show current date and time using user defined module in AngularJs. 

<!DOCTYPE html>
<html ng-app="DateTimeApp">
<head>
  <script src="angular.min.js"></script>
  <script src="Q7.js"></script>
</head>
<body>
  <div ng-controller="DateTimeController">
    <h1>Current Date and Time</h1>
    <p>{{ currentDate | date:'fullDate' }}</p>
    <p>{{ currentTime | date:'mediumTime' }}</p>
  </div>
</body>

</html>
// app.js
angular.module('DateTimeApp', [])
  .controller('DateTimeController', ['$scope', '$interval', function($scope, $interval) {
    $interval(function() {
      $scope.currentDate = new Date();
      $scope.currentTime = new Date();
    }, 1000);
  }]);

Write calculator program in AngularJs to perform basic arithmetic operations(+, -, *, /) using angular controller function.

<html ng-app="calculatorApp">
<head>
    <title>AngularJS Calculator</title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script>
    <script src="angular.min.js"></script>
    <script>
        angular.module('calculatorApp', [])
            .controller('CalculatorController', function ($scope) {
                $scope.num1 = 0;
                $scope.num2 = 0;
                $scope.result = 0;

                $scope.add = function () {
                    $scope.result = $scope.num1 + $scope.num2;
                };

                $scope.subtract = function () {
                    $scope.result = $scope.num1 - $scope.num2;
                };

                $scope.multiply = function () {
                    $scope.result = $scope.num1 * $scope.num2;
                };

                $scope.divide = function () {
                    $scope.result = $scope.num1 / $scope.num2;
                };
            });
    </script>
</head>
<body ng-controller="CalculatorController">
    <h1>AngularJS Calculator</h1>
    <label for="num1">Number 1:</label>
    <input type="number" id="num1" ng-model="num1">
    <label for="num2">Number 2:</label>
    <input type="number" id="num2" ng-model="num2">
    <br>
    <button ng-click="add()">Add</button>
    <button ng-click="subtract()">Subtract</button>
    <button ng-click="multiply()">Multiply</button>
    <button ng-click="divide()">Divide</button>
    <br>
    <label for="result">Result:</label>
    <input type="number" id="result" ng-model="result" disabled>
</body>
</html>

Program using NPM which will convert entered string into either case.

<html>
<head>
    <title>String Case Converter</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>
    <script>
        function convertString() {
            var inputString = document.getElementById('inputString').value;
            var lowercaseString = _.toLower(inputString);
            var uppercaseString = _.toUpper(inputString);

            document.getElementById('lowercaseResult').textContent = lowercaseString;
            document.getElementById('uppercaseResult').textContent = uppercaseString;
        }
    </script>
</head>

<body>
    <h1>String Case Converter</h1>

    <label for="inputString">Enter a string:</label>
    <input type="text" id="inputString">

    <button onclick="convertString()">Convert</button>

    <h2>Lowercase:</h2>
    <div id="lowercaseResult"></div>

    <h2>Uppercase:</h2>
    <div id="uppercaseResult"></div>
</body>

</html>

Write a program to create a calculator using Angular

/* app.component.css */
/* Angular calculator */
button{
    margin: 5px;
    width: 40px;
    height: 40px;
}
input{
    width: 237px;  
    height: 30px;
}
.calculator {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
}

<!-- app.component.html -->
<div class="calculator">
  <h2>Calculator</h2>
  <input type="text" [(ngModel)]="display" readonly>
  <div class="buttons">
    <hr>
    <button (click)="addToDisplay('1')">1</button>
    <button (click)="addToDisplay('2')">2</button>
    <button (click)="addToDisplay('3')">3</button>
    <button (click)="addToDisplay('4')">4</button>
    <button (click)="addToDisplay('5')">5</button>  <hr>
    <button (click)="addToDisplay('6')">6</button>
    <button (click)="addToDisplay('7')">7</button>
    <button (click)="addToDisplay('8')">8</button>
    <button (click)="addToDisplay('9')">9</button>
    <button (click)="addToDisplay('0')">0</button>  <hr>
    <button (click)="addToDisplay('+')">+</button>
    <button (click)="addToDisplay('-')">-</button>
    <button (click)="addToDisplay('*')">*</button>
    <button (click)="addToDisplay('/')">/</button>
    <button (click)="clearDisplay()">C</button>   <hr>
    <button (click)="calculateResult()">=</button>
  </div>
</div>

// app.componentspec.ts
import { TestBed } from '@angular/core/testing';
import { AppComponent } from './app.component';

describe('AppComponent', () => {
  beforeEach(() => TestBed.configureTestingModule({
    declarations: [AppComponent]
  }));

  it('should create the app', () => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.componentInstance;
    expect(app).toBeTruthy();
  });

  it(`should have as title 'calculator-app'`, () => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.componentInstance;
    expect(app.title).toEqual('calculator-app');
  });

  it('should render title', () => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const compiled = fixture.nativeElement as HTMLElement;
    expect(compiled.querySelector('.content span')?.textContent).toContain('calculator-app app is running!');
  });
});

// app.component.ts
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  display: string = '';

  addToDisplay(value: string) {
    this.display += value;
  }

  clearDisplay() {
    this.display = '';
  }

  calculateResult() {
    try {
      this.display = eval(this.display);
    } catch (e) {
      this.display = 'Error';
    }
  }
}
// app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';;

@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
  FormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }


Write a program to create a calculator using Node JS. (Install and configure Node JS and Server) 

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.question('Enter the first number: ', (num1) => {
  rl.question('Enter the second number: ', (num2) => {
    rl.question('Enter the operation (+, -, *, /): ', (operator) => {
      const n1 = parseFloat(num1);
      const n2 = parseFloat(num2);

      let result;

      switch (operator) {
        case '+':
          result = n1 + n2;
          break;
        case '-':
          result = n1 - n2;
          break;
        case '*':
          result = n1 * n2;
          break;
        case '/':
          result = n1 / n2;
          break;
        default:
          console.log('Invalid operator');
          rl.close();
          return;
      }

      console.log(`Result: ${result}`);

      rl.close();
    });
  });
});

Program for basic operations, array and user interface handling.

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

function performBasicOperations() {
  rl.question('Enter two numbers: ', (input) => {
    const numbers = input.split(' ').map(Number);

    const sum = numbers[0] + numbers[1];
    const difference = numbers[0] - numbers[1];
    const product = numbers[0] * numbers[1];
    const quotient = numbers[0] / numbers[1];

    console.log('Sum:', sum);
    console.log('Difference:', difference);
    console.log('Product:', product);
    console.log('Quotient:', quotient);

    rl.close();
  });
}

function manipulateArray() {
  rl.question('Enter elements of an array (space-separated): ', (input) => {
    const array = input.split(' ');

    console.log('Array:', array);
    console.log('Length:', array.length);
    console.log('First element:', array[0]);
    console.log('Last element:', array[array.length - 1]);

    rl.close();
  });
}

function handleUserInterface() {
  rl.question('Choose an operation: 1. Basic Operations 2. Array Manipulation ', (choice) => {
    if (choice === '1') {
      performBasicOperations();
    } else if (choice === '2') {
      manipulateArray();
    } else {
      console.log('Invalid choice! Please try again.');
      handleUserInterface();
    }
  });
}

handleUserInterface();