# Python Program – Find Area of Square

## Area of Square

To find the area of a square whose length of a side is given, use the following formula.

``Area of Rectangle = side * side``

## Program

In the following program, we shall define a function areaOfSquare() that takes length of a side as argument and return the area of square.

We read length of a side as integer from user, call areaOfSquare() with the length of side passed as argument. You can also read length of the side as floating-point number from user using float() function. In the following program we use int() and you may try float() as practice.

Input

length of a side, where side > 0

Python Program

``````def areaOfSquare(side) :
if side < 0 :
print('Side cannot be negative.')
return
return side * side

side = int(input('Enter side length : '))
area = areaOfSquare(side)
print(f'Area of Square : {area}')``````
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Output

``````Enter side length : 7
Area of Square : 49``````

Important Points regarding above program

• input() function reads a string from standard input. Therefore, we have used int() function to convert string to integer.
• If given length of side is less than zero, we are returning nothing.
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