Python: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers
Python List: Exercise - 16 with Solution
Write a Python program to generate and print a list of the first and last 5 elements where the values are square numbers between 1 and 30 (both included).
Pictorial Presentation:

Sample Solution:
Python Code:
def printValues():
l = list()
for i in range(1,21):
l.append(i**2)
print(l[:5])
print(l[-5:])
printValues()
Sample Output:
[1, 4, 9, 16, 25] [256, 289, 324, 361, 400]
Explanation:
In the above example -
def printValues(): -> Defines a function named printValues.
l = list() -> Initializes an empty list named l.
for i in range(1,21): l.append(i**2)
Iterates through numbers 1 to 20 using a for loop and calculates their square, then appends the result to the l list.
print(l[:5]) -> Prints the first five elements of the l list using slice notation.
print(l[-5:]) -> Prints the last five elements of the l list using slice notation.
printValues() -> Finally calls the printValues() function. When executed, it will print the first five elements ([1, 4, 9, 16, 25]) and the last five elements ([256, 289, 324, 361, 400]) of the list of squares of numbers from 1 to 20.
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Python: Tips of the Day
Given a predicate function, fn, and a prop string, this curried function will then take an object to inspect by calling the property and passing it to the predicate:
Example:
def tips_check_prop(fn, prop): return lambda obj: fn(obj[prop]) check_age = tips_check_prop(lambda x: x >= 25, 'age') user = {'name': 'Owen', 'age': 25} print(check_age(user))
Output:
True
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