Akshita Dudani

Java Methods

Methods Practice

1. Write a Java to check if a person is eligible to vote based on their age. Create a method to check the eligibility. Sample Input Enter your age: 19 Output You are eligibile to vote!. Try it out yourself here! Solution Code Try on Compiler! import java.util.Scanner;

Java Methods

Local Variables in a Method

What are Local Variables? Imagine you have a special calculator (your program) that can add two numbers. You tell it to add 2 and 5, and it does the math inside a secret box (the method). Now, imagine you want to see the result outside of the secret box. If

Java Methods

Standard Library Methods

Introduction So, imagine you're cooking, and you have your own recipe (those are like the methods you create). But sometimes, you use pre-made ingredients or tools (those are like the standard library methods). In Java, there are these pre-made methods that are already there for you to use

Java Methods

Use of Arguments and Return Type in a Method

Using arguments and return values in a method allows us to create a piece of code that can be used independently, like a helpful tool. Let's understand this with an example of a method we write to add two numbers: int addNumbers(int n1, int n2) { int result

Java Methods

Method Arguments in Java

Method arguments are essential in programming because they provide a way to pass data to a method, allowing it to perform tasks with varying inputs. Let's try to understand with the help of an example where we write a method to multiply two numbers. class Main { // Method to

Java Methods

Methods in Java

In this chapter, we're going to explore a powerful way to tidy up our code – using something called methods. As our programs get more complex, the code can start to look messy and become a bit of a puzzle. That's where methods come to the rescue!

Java Arrays

Arrays: Practice Problems I

1. Write a java program to find second largest element in an array. If not exist, then return -1. Input Enter the size of the array: 10 Enter array elements: 7 2 3 8 6 6 75 38 3 2 Output 38 Try it out yourself here! Solution Code Try

Java Arrays

Iterating Through Arrays

Looping through an array means going through each item in the array. There are two common ways to do this in Java. Using a For Loop: String[] friends = {"Rahul", "Simran", "Kiran", "Naina", "Aman"}; for (int i = 0; i < friends.

Java Arrays

Types of Array in Java

There are two types of arrays. * Single Dimensional Array * Multidimensional Array Single Dimensional Array Contains only one level or dimension. It's like a simple list having a row of boxes where you can store and retrieve elements using their position (index) in the row. Syntax int[] numbers = new

Java Arrays

Arrays in Java

Think about needing to keep track of the ages of 100 people. It would be quite a hassle if we had to create separate variables for each person's age, right? That's where arrays come in handy. Introduction Imagine an array like a storage box that can

Java Control Flow

Switch Statement in Java

In our previous lessons, we learned about the if...else statement, which helps us make decisions between two options. But what if we have to choose from more than two options? For instance, let's say we're given a number from 1 to 7, and we need

Java Control Flow

Break and Continue in Java

The "break" statement is like a stop sign for a loop in programming. Imagine you're counting numbers using a loop, and you want to stop the counting when a certain condition is met. That's when you use "break."  And the "continue&

Java Control Flow

Standard Practice problems

1. Write a java program to check whether a character is alphabet, digit or special character. Example Input Input any character: E Expected output Alpabet Try it out yourself here! Hint Every character, like letters, numbers, or special symbols, has a unique number assigned to it, called the ASCII value.

Java Introduction

First Program in Java

A "Hello, World!" program is a basic code that displays the message "Hello, World!" on the screen. It's commonly used to introduce beginners to a new programming language. // This is a comment. It's like a note for humans to read, but the

Java Introduction

JVM, JRE, JDK

JVM (Java Virtual Machine) Imagine the Java Virtual Machine (JVM) like a magic engine for running computer programs. Even though you can't touch or see it, it's there to make sure your Java programs work. That's why it is called a virtual machine because

Java Introduction

Java vs C++

C++ Java Platform dependent, it depends on the platform, Code needs to be compiled separately for each platform, and binaries are often platform-dependent. Platform Independent, Code is compiled into an intermediate form (bytecode) that runs on the Java Virtual Machine (JVM). This enables "write once, run anywhere" (WORA)

Java Introduction

Features of Java

Java is a versatile and widely used programming language known for its unique features that contribute to its popularity. These features, often referred to as Java's "buzzwords," are designed to make it portable, simple, secure, and suitable for a variety of applications. Below is a compilation

Java Introduction

What is Java?

Imagine you have a recipe book (Java) that tells you how to make different types of delicious food items (applications). You follow the step-by-step instructions (write code) provided in the book and use various ingredients (Java features) to bake your cake (create your application). Audience Our Java programming tutorial is

Java Control Flow

do....while Loop in Java

The Java do-while loop is similar to what 'while' and 'for' loop that lets you do something in your program over and over again until a certain condition is met. It's useful when you're not sure how many times you want to

Java Control Flow

For Loop in Java

for loop is also used to iterate a specific part of the code multiple times. When you know the exact number of iterations in advance, it is recommended to use for loop. It's syntax is as follows - for (initialization; condition; increment/decrement) { // code to be executed. } Let&

Java Control Flow

While Loop in Java

Introduction to Loops Imagine you're in a candy shop and you want to keep buying candies until you've spent all your money. You check your wallet after each purchase, and as long as you have enough money left, you keep buying more candies. Once you run

Java Control Flow

If-Else Statement in Java

Introduction So far, we've been writing programs that follow one instruction after another in a sequence. But in many cases, we might need to skip certain instructions and execute others to solve a problem, this is where we required control flow statements. A real life example of the

Java Control Flow

Making Logical Decisions in Programming: Comparing Values and Variables

Introduction In programming, the comparison of values and variables plays a crucial role in making decisions and building logical structures. To illustrate, imagine a scenario where we have to evaluate whether a student has passed or failed an examination. This evaluation will require comparing the student's achieved score

Building Blocks in Java

User Input in Java

Learning how to get user input in Java helps you make programs that can talk to people. It's like teaching your program to understand what people want, so you can make your programs work better for them. So far, we've been directly assigning values to variables

Building Blocks in Java

Type Conversion in Java

In Java, we work with different types of data. We have: * int for numbers without decimal points, like 5 or -6. * double for numbers with decimal points, like -5.6 or 7.84. * char for single characters, like 'a' or '1'. Sometimes, we need to change