✅ Java Practice Programs (No Loops / No If-Else)

✅ Java Practice Programs (No Loops / No If-Else)

 Beginner-friendly Java practice programs that avoid loops and if-else, focusing only on fundamentals like data types, variables, assignments, initialization, and simple operators. 

1. 📝 Print your name and age

2. ➕ Add two integers and print the result

3. ➖ Subtract two float numbers and print the result

4. ✖️ Multiply two double values and print the result

5. ➗ Divide two integers and print the quotient and remainder

6. 🔄 Swap two numbers using a third variable

7. 🔃 Swap two numbers without using a third variable

8. 📊 Assign values to byte, short, int, long, float, and double and print them

9. 🔗 Concatenate and print first name and last name

10. 📐 Calculate area of a rectangle using length * breadth

11. ⚪ Calculate area of a circle (π * radius * radius)

12. 🌡️ Convert temperature from Celsius to Fahrenheit

13. 🌡️ Convert temperature from Fahrenheit to Celsius

14. ✅ Check if a number is greater than 10 using logical AND (&&) operator

15. 🔄 Check if a number is less than 5 or greater than 15 using logical OR (||) operator

16. 💰 Calculate the simple interest ((P * T * R) / 100)

17. 🆙 Assign a string and add (concatenate) number 25 to it and print

18. 🔒 Assign a value to a boolean variable based on an expression and print it

19. ⚖️ Find the average of three numbers and print the result

20. 🔢 Print the square and cube of a number

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🆕 String-Specific Programs

21. 🔢 Find and print the length of a given string

22. 🔠 Convert a string to uppercase and print it

23. 🔡 Convert a string to lowercase and print it

24. ✂️ Extract and print the first 3 characters (substring) from a string

25. ➕ Concatenate two strings with a space in between and print the result