Write a Python program that takes a string as input and checks if it is a palindrome. A palindrome is a word, phrase, number, or other sequence of characters that reads the same backward as forward.
Input: "radar"
Output: It is a palindrome.
Input: "python"
Output: It is not a palindrome.
Write a Python program that takes an integer as input and checks if it is a prime number. A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.
Input: 7
Output: It is a prime number.
Input: 12
Output: It is not a prime number.
Write a Python program to print the following pattern using loops:
Output:
*
**
***
****
*****
Write a Python program to generate the first n terms of the Fibonacci sequence using a while loop. The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones, usually starting with 0 and 1.
Input: n = 8
Output: 0, 1, 1, 2, 3, 5, 8, 13
Write a Python program that takes a year as input and checks if it is a leap year. A leap year is divisible by 4 but not by 100 unless it is also divisible by 400.
Input: 2020
Output: It is a leap year.
Input: 1900
Output: It is not a leap year.
Input: 2000
Output: It is a leap year.