Python Program to Find Area and Perimeter of a Rectangle
easyInput and operatorsPython
A classic formula program: read two measurements, apply two formulas, print two answers on separate lines.
The question
Read the length and the breadth of a rectangle (integers, one per line). Print its area on one line and its perimeter on the next.
The code
program.py
l = int(input())
b = int(input())
print("Area =", l * b)
print("Perimeter =", 2 * (l + b))Input
30 3
Output
Area = 90 Perimeter = 66
How it works
- 1Read the length l and breadth b as integers.
- 2Area is l × b, written l * b in Python.
- 3Perimeter is 2 × (l + b) — the brackets make Python add before it multiplies.
- 4Each print() starts a new line, so area and perimeter appear on separate lines.
Common mistakes
- Writing 2 * l + b: without brackets only l is doubled, and the perimeter is wrong.
- Using x for multiplication — Python only understands *.
With decimal length and breadth
int() fails on 4.5. Use float() when the sides can have a decimal point; the answers then print as decimals too.
program.py
l = float(input())
b = float(input())
print("Area =", l * b)
print("Perimeter =", 2 * (l + b))Input
4.5 2
Output
Area = 9.0 Perimeter = 13.0
Using a function that returns both values
A Python function can return two values at once, separated by a comma. They are unpacked into two variables on the calling line.
program.py
def rectangle(l, b):
return l * b, 2 * (l + b)
area, perimeter = rectangle(12, 5)
print("Area =", area)
print("Perimeter =", perimeter)Input
(no input)
Output
Area = 60 Perimeter = 34
Questions students ask
- How do you find the area of a rectangle in Python?
- Multiply the length by the breadth: area = l * b. Read both values with int(input()) or float(input()) first, because input() gives text.
- What is the formula for the perimeter of a rectangle in Python?
- perimeter = 2 * (l + b). The brackets are required — without them Python doubles only the length.
Now solve a similar question yourself
A new Python question every time, checked instantly.
Preparing for NIELIT O Level?
This program is the kind asked in the M3 (Python) theory paper and the PR-3 practical exam.