Question

What declarations, inputs, processing, and outputs are needed to calculate the area of a rectangle?​

Answer 1

Answer:

Declaration: length, width, area

Inputs: length & width

Processing: length & width

Output: area

Explanation:

The area of a rectangle uses the formula: $A=lw$. In your coding, you need to ask for user input for the length and width in order to calculate the area.

Your processing would simplify multiple the user's input together stored in some type of sum variable.

Now I don't know what program language you are using but I will give you an idea.

Code (Python)

#Define variables equal to user input.

length = int(input("Enter the length of the rectangle: "))

width = int(input("Enter the width of the rectangle: "))

area = length * width

Your output would be the area, but you can manipulate it if you want.

print("The area of the rectangle is", area)

So the program would run like this:

Enter the length of the rectangle: 3 <--you type a number

Enter the width of the rectangle: 5

The area of the rectangle is 15

Sidenotes: if you are using ints, the number MUST be a whole number or the program will throw an error. If you are using decimals, use a float.