first commit

Author: Sreenivasulu-Kalluru

.gitignore

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+node_modules
+.DS_Store

01-basic-challenges-1/01-hello-world/hello-world-run.js

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+const helloWorld = require('./hello-world');
+
+const result = helloWorld();
+
+console.log(result);

01-basic-challenges-1/01-hello-world/hello-world-solution.js

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+function helloWorld() {
+  // Return the string 'Hello World!'
+  return 'Hello World!';
+}
+
+module.exports = helloWorld;

01-basic-challenges-1/01-hello-world/hello-world.js

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+function helloWorld() {
+  return 'Hello World!';
+}
+
+module.exports = helloWorld;

01-basic-challenges-1/01-hello-world/hello-world.test.js

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+const helloWorld = require('./hello-world');
+
+test("Returning 'Hello, World!' as a string", () => {
+  const result = helloWorld();
+  expect(result).toBe('Hello World!');
+});

01-basic-challenges-1/01-hello-world/readme.md

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+# Challenge: Hello World Sample Challenge
+
+This is a practice challenge to show you how things are set up and how to test, etc.
+
+## Instructions
+
+Write a function called `helloWorld` that returns a string of 'Hello World!'.
+
+### Function Signature
+
+```js
+/**
+ * Returns a string containing 'Hello World!'.
+ * @returns {string} - The string 'Hello World!'.
+ */
+function helloWorld(): string;
+```
+
+### Examples
+
+```JS
+helloWorld() // 'Hello World!'
+```
+
+### Constraints
+
+I will put any constraints here. They will vary depending on the challenge.
+
+- The function must return a string
+
+### Hints
+
+- I will put a couple hints here. You can choose to use them or not.
+
+## Solutions
+
+<details>
+  <summary>Click For Solution</summary>
+
+```JS
+function printHelloWorld() {
+  return 'Hello World!';
+}
+```
+
+### Explanation
+
+I will put the explanation to the solution here. The length and depth of the explanation will vary depending on the challenge.
+
+</details>
+
+### Test Cases
+
+The Jest tests will go here. They are already included in the course files. You just need to run `npm test`. Sometimes I will also put manual tests here.
+
+```JS
+test("Returning 'Hello, World!' as a string", () => {
+  const result = helloWorld();
+  expect(result).toBe('Hello World!');
+});
+```

01-basic-challenges-1/02-get-sum/get-sum-run.js

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+const getSum = require('./get-sum');
+
+const result = getSum(1, 10);
+
+console.log(result);

01-basic-challenges-1/02-get-sum/get-sum-solution.js

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+function getSum(a, b) {
+  // return the sum of a and b
+  return a + b;
+}
+
+module.exports = getSum;

01-basic-challenges-1/02-get-sum/get-sum.js

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+function getSum(a, b) {
+  return a + b;
+}
+
+module.exports = getSum;

01-basic-challenges-1/02-get-sum/get-sum.test.js

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+const getSum = require('./get-sum');
+
+test('Calculating the sum of two numbers', () => {
+  // Test case inputs
+  const num1 = 5;
+  const num2 = 7;
+
+  // Call the function
+  const result = getSum(num1, num2);
+
+  // Check if the result is equal to the expected sum
+  expect(result).toBe(12);
+});

01-basic-challenges-1/02-get-sum/readme.md

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+# Challenge: Get Sum
+
+This is another very basic practice challenge just to get you into the hang of things.
+
+## Instructions
+
+Write a function called `getSum` that takes in two numbers and returns the sum of those two numbers.
+
+### Function Signature
+
+```js
+/**
+ * Returns the sum of two numbers.
+ * @param {number} a - The first number.
+ * @param {number} b - The second number.
+ * @returns {number} - The sum of the two numbers.
+ */
+function getSum(a: number, b: number): number;
+```
+
+### Examples
+
+```JS
+getSum(1, 2) // 3
+getSum(10, 5) // 15
+getSum(2, 2) // 4
+getSum(10, 5) // 15
+```
+
+### Constraints
+
+- The function must return a number
+
+### Hints
+
+- You can use the `+` operator to add two numbers together.
+
+## Solutions
+
+<details>
+  <summary>Click For Solution</summary>
+
+```JS
+function getSum(a, b) {
+  return a + b;
+}
+```
+
+### Explanation
+
+This is a pretty simple challenge. We created a function that takes in two values and we added those two values together. We then returned the sum of those two values.
+
+</details>
+
+### Test Cases
+
+```JS
+test('Calculating the sum of two numbers', () => {
+  // Test case inputs
+  const num1 = 5;
+  const num2 = 7;
+
+  // Call the function
+  const result = getSum(num1, num2);
+
+  // Check if the result is equal to the expected sum
+  expect(result).toBe(12);
+});
+```

01-basic-challenges-1/03-calculator/calculator-run.js

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+const calculator = require('./calculator');
+
+const result = calculator(1, 2, '+');
+
+console.log(result);

01-basic-challenges-1/03-calculator/calculator-solution.js

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+// Solution 1
+function calculator(num1, num2, operator) {
+  // Declare a variable to store the result
+  let result;
+
+  // Use a switch statement to determine which operation to perform
+  switch (operator) {
+    case '+':
+      result = num1 + num2;
+      break; // Break out of the switch statement
+    case '-':
+      result = num1 - num2;
+      break;
+    case '*':
+      result = num1 * num2;
+      break;
+    case '/':
+      result = num1 / num2;
+      break;
+    default:
+      // If the operator is not one of the above, throw an error
+      throw new Error('Invalid operator');
+  }
+
+  return result;
+}
+
+// Solution 2
+function calculator(num1, num2, operator) {
+  // Declare a variable to store the result
+  let result;
+
+  // Use if/else if/else statements to determine which operation to perform
+  if (operator === '+') {
+    result = num1 + num2;
+  } else if (operator === '-') {
+    result = num1 - num2;
+  } else if (operator === '*') {
+    result = num1 * num2;
+  } else if (operator === '/') {
+    result = num1 / num2;
+  } else {
+    // If the operator is not one of the above, throw an error
+    throw new Error('Invalid operator');
+  }
+
+  return result;
+}
+
+module.exports = calculator;

01-basic-challenges-1/03-calculator/calculator.js

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+// function calculator(num1, num2, operator) {
+//   let result;
+
+//   switch (operator) {
+//     case '+':
+//       result = num1 + num2;
+//       break;
+//     case '-':
+//       result = num1 - num2;
+//       break;
+//     case '*':
+//       result = num1 * num2;
+//       break;
+//     case '/':
+//       result = num1 / num2;
+//       break;
+//     default:
+//       throw new Error('Invalid operator');
+//   }
+
+//   return result;
+// }
+
+function calculator(num1, num2, operator) {
+  let result;
+
+  if (operator === '+') {
+    result = num1 + num2;
+  } else if (operator === '-') {
+    result = num1 - num2;
+  } else if (operator === '*') {
+    result = num1 * num2;
+  } else if (operator === '/') {
+    result = num1 / num2;
+  } else {
+    throw new Error('Invalid operator');
+  }
+
+  return result;
+}
+
+module.exports = calculator;

01-basic-challenges-1/03-calculator/calculator.test.js

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+const calculator = require('./calculator');
+
+test('Performing arithmetic operations using the calculator function', () => {
+  // Test case inputs
+  const num1 = 5;
+  const num2 = 7;
+
+  // Addition
+  expect(calculator(num1, num2, '+')).toBe(12);
+
+  // Subtraction
+  expect(calculator(num1, num2, '-')).toBe(-2);
+
+  // Multiplication
+  expect(calculator(num1, num2, '*')).toBe(35);
+
+  // Division
+  expect(calculator(num1, num2, '/')).toBeCloseTo(0.7143, 4);
+});