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Java Basics
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Course Content

Java Basics

Java Basics

1. Getting Started
Backend DevelopmentRole of Java in the Backend Java Advantages Memory Types In Java Java's SyntaxYour First ProgramComments
2. Basic Types and Operations
Primitive Data TypesChallenge: Primitive TypesMathematical Operations on charMathematical Operations in JavaIf-Else StatementSwitch-Case StatementNew Task StructureChallenge: Weekday Switch
3. Loops
Introduction to LoopsWhile-LoopDo-While LoopChallenge: Building a Server Retry MechanismFor-Loop Increment and DecrementInfinite LoopChallenge: Filtering Numbers in a Loop
4. Arrays
What is Array?Using Loops with ArraysIndex Out Of BoundsTwo-Dimentional ArrayIteration In Two-Dimensional ArrayFor-Each Loop
5. String
What Is String? Basic Methods In StringPractical Applications of String MethodsChallenge: Filter Failure MessagesNullPointerException StringBuilderString Pool, Method Equals() Summary

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Challenge: Filtering Numbers in a Loop

Task

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Find the sum of all numbers from 1 to n, excluding those that are divisible by 3 or 5.

  1. Create a method called sumNotDivisibleBy3Or5(int n) that returns an int.
  2. Inside this method, create a for loop that iterates from 1 to n (inclusive).
  3. In each iteration, check if the number is not divisible by 3 and not divisible by 5.
  4. If the number passes the condition, add it to a running total sum.
  5. Return the total sum after the loop ends.

Solution

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solution

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Section 3. Chapter 8
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Challenge: Filtering Numbers in a Loop

Task

Swipe to start coding

Find the sum of all numbers from 1 to n, excluding those that are divisible by 3 or 5.

  1. Create a method called sumNotDivisibleBy3Or5(int n) that returns an int.
  2. Inside this method, create a for loop that iterates from 1 to n (inclusive).
  3. In each iteration, check if the number is not divisible by 3 and not divisible by 5.
  4. If the number passes the condition, add it to a running total sum.
  5. Return the total sum after the loop ends.

Solution

java

solution

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Section 3. Chapter 8
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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