Introduction

In this lesson, we can discuss user-defined methods and practise various ways of defining and executing them.

Model 1: Input, Process and Output in Method: void And Non-parameterized

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1. Write a program using a method named area() that input length and breadth of a rectangle, calculate area and print it.

Description & Input and Output

Do Yourself

2. Write a program using a method average() that inputs two marks, calculates average and prints it.

Practice Problem

3. W a p using a method toCelsius() that input a degree in Fahrenheit, convert to Celsius and print it. C= 5.0/9*(F-32)

Model 2: Input and Process in Method: Non-void And Non-parameterized

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4. Write a program using a method area() that inputs length and breadth, calculates area and returns it. The main() prints area.

Description & Input and Output

Do Yourself

5. Write a program using method circumference() that inputs radius of a circle, calculate circumference (2πr) and returns it; the main() prints it.

Practice Problem

6. W a p using a method toFahrenheit() that input a degree in Celsius, convert to Fahrenheit and return it. The main() prints it. F=1.8*C+32

Model 3: Process in Method: Non-void And Parameterized

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7. Write a program using method area() that receives length and breadth as arguments, calculates area and returns it; main() prints it.

Description & Input and Output

Do Yourself

8. Write a program using method volume() that receives radius and height of a cylinder as parameter, calculates volume (πr2h) and returns it; main() prints it.

Practice Problem

9. W a p using method simple() that receives principal amount, rate and time as arguments, calculates and returns simple interest. (si= prt/100). The main prints it.

Model 4: Process and Output in Method: void And Parameterized

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10. Write a program using method area() that receives length and breadth as parameter, calculates area and prints it.

Description & Input and Output

Do Yourself

11. Write a program using method perimeter() that receives length and breadth of a rectangle as arguments, calculates perimeter and prints it. p=2(l+b).

Practice Problem

12. W a p using a method compound() that receives principal amount, rate and time as arguments, calculates and prints the compound interest. Formula: ci= p[(1+r/100)^t-1]