# Python: Compute the square of first N Fibonacci numbers, use map function and generate a list of the numbers

## Python map: Exercise-10 with Solution

Write a Python program to compute the square of the first N Fibonacci numbers, using the map function and generate a list of the numbers.

**Fibonacci numbers:**

From Wikipedia,

In mathematics, the Fibonacci numbers, commonly denoted Fn, form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1. That is,

**F _{0} = 0, F_{1} = 1,**

and

**F _{n} = F_{n - 1} + F_{n - 2},**

for n > 1.

The beginning of the sequence is thus:

**0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,....**

**Sample Solution**:

**Python Code :**

```
# Import the 'itertools' module
import itertools
# Set the value of 'n' to 10
n = 10
# Define a generator function named 'fibonacci_nums' to generate Fibonacci numbers
def fibonacci_nums(x=0, y=1):
yield x
while True:
yield y
x, y = y, x + y
# Print a message indicating the operation to be performed
print("First 10 Fibonacci numbers:")
# Use itertools.islice to obtain the first 10 Fibonacci numbers and store the result in 'result'
result = list(itertools.islice(fibonacci_nums(), n))
# Print the result of the islice operation as a list
print(result)
# Define a lambda function named 'square' to calculate the square of a given number
square = lambda x: x * x
# Print a message indicating the operation to be performed
print("\nAfter squaring said numbers of the list:")
# Use the map function to apply the 'square' function to each element in 'result'
# and print the result as a list of squared numbers
print(list(map(square, result)))
```

Sample Output:

First 10 Fibonacci numbers: [0, 1, 1, 2, 3, 5, 8, 13, 21, 34] After squaring said numbers of the list: [0, 1, 1, 4, 9, 25, 64, 169, 441, 1156]

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