Elevate Your JavaScript Game: Master Operators with These 10 Coding Exercises!

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Whether you’re a beginner or an experienced developer, these exercises are designed to strengthen your understanding and finesse your skills in JavaScript. 💻✨

What’s in the Box?

  • 🔢 Arithmetic Operators
  • 🔀 Logical Operators
  • 🔄 Ternary and Bitwise Operations
  • 🔍 In-depth explanations and code examples

It’s not just about knowing the syntax; it’s about understanding how and when to use these operators efficiently. These exercises will challenge you, make you think, and most importantly, improve your coding skills. 🧠

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Exercise: Use the addition operator to concatenate two strings: “Hello” and “World”.

Solution:

let result = “Hello” + “World”;

console.log(result); // “HelloWorld”

Explanation: The + operator in JavaScript is used for both addition and string concatenation. When used with strings, it concatenates them.

Exercise: Use the strict equality operator to compare 5 and “5”.

Solution:

console.log(5 === “5”); // false

Explanation: The === operator checks both the value and the type of the operands. Since 5 is a number and “5” is a string, the result is false.

Exercise: Increment the value of a variable x initialized to 5 using the post-increment operator and print the result.

Solution:

let x = 5;

console.log(x++); // 5

console.log(x); // 6

Explanation: The post-increment operator (x++) increases the value of x but returns the original value. After the increment, x becomes 6.

Exercise: Use the modulus operator to find the remainder of 15 divided by 4.

Solution:

let remainder = 15 % 4;

console.log(remainder); // 3

Explanation: The modulus operator (%) returns the remainder of the division of two numbers. Here, 15 divided by 4 leaves a remainder of 3.

Exercise: Use the bitwise AND operator to compare 5 and 3 and print the result.

Solution:

let result = 5 & 3;

console.log(result); // 1

Explanation: The bitwise AND (&) operator compares each bit of its first operand to the corresponding bit of its second operand. If both bits are 1, the corresponding bit in the result is set to 1. In binary, 5 is 101 and 3 is 011, so the result is 001, which is 1 in decimal.

Exercise: Determine if the value of a variable a is odd using bitwise operators.

Solution:

let a = 7;

console.log((a & 1) === 1); // true

Explanation: The expression (a & 1) returns 1 if the least significant bit of a is 1 (indicating an odd number), and 0 if it is even.

Exercise: Use the ternary operator to assign the smaller of two numbers a and b to a variable min.

Solution:

let a = 10, b = 20;

let min = a < b ? a : b;

console.log(min); // 10

Explanation: The ternary operator (condition ? expr1 : expr2) evaluates the condition and returns expr1 if true, and expr2 if false. Here, it checks if a is less than b and assigns the smaller number to min.

Exercise: Use the delete operator to remove the property age from the object {name: “Alice”, age: 25}.

Solution:

let person = { name: “Alice”, age: 25 };

delete person.age;

console.log(person); // { name: “Alice” }

Explanation: The delete operator removes a property from an object. Here, it removes the age property from the person object.

Exercise: Write a JavaScript expression using the logical OR operator that returns true if either variable x or y is true, but not both.

Solution:

let x = true, y = false;

console.log((x || y) && !(x && y)); // true

Explanation: The expression (x || y) returns true if either x or y is true. The additional !(x && y) ensures that it returns false if both are true.

Exercise: Use the spread operator to merge two arrays [1, 2, 3] and [4, 5, 6].

Solution:

let array1 = [1, 2, 3];

let array2 = [4,

5, 6];

let mergedArray = […array1, …array2];

console.log(mergedArray); // [1, 2, 3, 4, 5, 6]

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– Explanation: The spread operator (…) allows an iterable (like an array) to be expanded where multiple elements or variables are expected. Here, it is used to combine array1 and array2 into a new array mergedArray.