Arithmetic Operators in JavaScript note with sample code

Author: Adam-7th-2

.history/.gitignore_20250701032400

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+// 🌟 Arithmetic Operators in JavaScript
+
+// 1. Basic Arithmetic Operations
+const x = 12;
+const y = 3;
+
+console.log("=== Basic Arithmetic Operations ===");
+console.log("Addition:", x + y); // 15
+console.log("Subtraction:", x - y); // 9
+console.log("Multiplication:", x * y); // 36
+console.log("Division:", x / y); // 4
+console.log("Remainder:", x % y); // 0
+console.log("Exponentiation x ** 2:", x ** 2); // 144
+console.log("Exponentiation y ** 3:", y ** 3); // 27
+
+// 2. String Addition
+const a = "12";
+const b = "3";
+
+console.log("\n=== String Addition (Concatenation) ===");
+console.log("a + b:", a + b); // "123" (string concatenation)
+
+// 3. Other Operations with String Numbers
+console.log("\n=== Arithmetic with String Numbers ===");
+console.log("a - b:", a - b); // 9
+console.log("a * b:", a * b); // 36
+console.log("a / b:", a / b); // 4
+
+// 4. Mixing String and Number
+const c = 12;
+const d = "3";
+
+console.log("\n=== Mixing Number and String ===");
+console.log("c + d:", c + d); // "123"
+console.log("c - d:", c - d); // 9
+console.log("c * d:", c * d); // 36
+console.log("c / d:", c / d); // 4
+
+// 5. Invalid String Arithmetic
+const str1 = "apple";
+const str2 = "mango";
+
+console.log("\n=== Non-numeric String Operations ===");
+console.log("str1 + str2:", str1 + str2); // "applemango"
+console.log("str1 - str2:", str1 - str2); // NaN
+console.log("str1 * str2:", str1 * str2); // NaN
+console.log("str1 / str2:", str1 / str2); // NaN
+
+// 6. Best Practice: Convert String to Number
+console.log("\n=== Converting Input to Number ===");
+const userInput = "42"; // Simulating user input
+const numberInput = Number(userInput); // Convert to number
+
+if (!isNaN(numberInput)) {
+  console.log(`Converted and added: ${numberInput + 8}`); // 50
+} else {
+  console.log("Invalid input");
+}

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+//  Arithmetic Operators in JavaScript
+
+// 1. Basic Arithmetic Operations
+const x = 12;
+const y = 3;
+
+console.log("=== Basic Arithmetic Operations ===");
+console.log("Addition:", x + y); // 15
+console.log("Subtraction:", x - y); // 9
+console.log("Multiplication:", x * y); // 36
+console.log("Division:", x / y); // 4
+console.log("Remainder:", x % y); // 0
+console.log("Exponentiation x ** 2:", x ** 2); // 144
+console.log("Exponentiation y ** 3:", y ** 3); // 27
+
+// 2. String Addition
+const a = "12";
+const b = "3";
+
+console.log("\n=== String Addition (Concatenation) ===");
+console.log("a + b:", a + b); // "123" (string concatenation)
+
+// 3. Other Operations with String Numbers
+console.log("\n=== Arithmetic with String Numbers ===");
+console.log("a - b:", a - b); // 9
+console.log("a * b:", a * b); // 36
+console.log("a / b:", a / b); // 4
+
+// 4. Mixing String and Number
+const c = 12;
+const d = "3";
+
+console.log("\n=== Mixing Number and String ===");
+console.log("c + d:", c + d); // "123"
+console.log("c - d:", c - d); // 9
+console.log("c * d:", c * d); // 36
+console.log("c / d:", c / d); // 4
+
+// 5. Invalid String Arithmetic
+const str1 = "apple";
+const str2 = "mango";
+
+console.log("\n=== Non-numeric String Operations ===");
+console.log("str1 + str2:", str1 + str2); // "applemango"
+console.log("str1 - str2:", str1 - str2); // NaN
+console.log("str1 * str2:", str1 * str2); // NaN
+console.log("str1 / str2:", str1 / str2); // NaN
+
+// 6. Best Practice: Convert String to Number
+console.log("\n=== Converting Input to Number ===");
+const userInput = "42"; // Simulating user input
+const numberInput = Number(userInput); // Convert to number
+
+if (!isNaN(numberInput)) {
+  console.log(`Converted and added: ${numberInput + 8}`); // 50
+} else {
+  console.log("Invalid input");
+}

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+// String Concatenation example
+let name = "Henok"; // Declare variable for name
+let age = 22; // Declare variable for age
+
+// Create message by joining strings using + operator
+let messageConcat = "My name is " + name + " and I am " + age + " years old.";
+console.log(messageConcat); // Output: My name is Henok and I am 22 years old.
+
+// Template Literal example
+// Use backticks and ${} to embed variables directly
+let messageTemplate = `My name is ${name} and I am ${age} years old.`;
+console.log(messageTemplate); // Output: My name is Henok and I am 22 years old.
+
+// Multiline Template Literal example
+// Allows easy multiline strings without + or \n
+let multilineMessage = `My name is ${name}.
+I am ${age} years old.
+I love coding and learning new things.`;
+console.log(multilineMessage);
+/* Output:
+My name is Henok.
+I am 22 years old.
+I love coding and learning new things.
+*/