**Write a program to subtract, add, multiply, and divide 2 numbers (calculator program). **

**Write a program to print the ASCII value of a character. **

**Write a program to convert ASCII value to a character. **

**Write a program to convert a character from lower case to upper case and from upper case to lower case. **

**Write a program to calculate the percentage of marks of 5 subjects of a student. **

**Write a program to calculate the arithmetic mean, using formula am = (sum of n terms)/n. **

**Write a program to find any power of a number. **

**Write a program to find the square root and cube root of a number. **

**Write a program to find SIN, COS, sec, TAN, and COSEC of an angle. **

**Write a program to find quotient and remainder. **

**Write a program to swap two numbers. **

**Write a program to swap two numbers without using a third variable. **

**Write a program to print the sum of digits of a number. **

**Write a program to reverse a number. **

**Write a program to print the factorial of a number. **

**Write a program to find the area and perimeter of a rectangle, using the formula area = l*w and perimeter = 2*(l+w). **

**Write a program to find the area and circumference of a circle, using the formula area = 3.14 *radius ^{2} and circumference = 2 * π * radius. **

**Write a program to find surface area and volume of a cone, using formula sa = π * radius (radius + √(h ^{2}+r^{2})) and volume = π * radius^{2} * (height / 3). **

**Write a program to find the perimeter of a parallelogram, using the formula perimeter = 2 (side + base). **

**Write a program to convert centigrade to Fahrenheit using formula, t_{(°f)} = t_{(°c)} × 9/5 + 32 and Fahrenheit to centigrade using formula, t_{(°c)} = (t_{(°f)} – 32) × 5/9. **

**Write a program to find the area of a triangle using the formula **** **

**Program to find simple interest using the formula, simple interest = (p * t * r)/100, where p = principle amount, t= time period and r= rate of interest. **

**A program that asks the user how many eggs he/she has and then tells the user how many dozen eggs he/she has and how many extra eggs are leftover. **

** Write a program to solve the equation, y = b^{2} – 4ac. The program should ask the values of variables a, b and c from the user and display the result. **

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**A milk carton can hold 3.78 liters of milk. Each morning, a dairy farm ships cartons of milk to a local grocery store. The cost of producing one liter of milk is $0.38 and the profit of each carton of milk is $0.27. Write a program that does the following: **

· **Prompt the user to enter the total amount of milk produced in the morning **

· **Outputs the number of milk cartons needed to hold milk **

· **Output the cost of producing milk **

· **Outputs the profit for producing milk **