1] Create a simple program named "Hello World" in bash programming. A "Hello, World!" is a simple program that outputs Hello, World! on the screen. 2] Check whether an integer (entered by the user) is a prime number or not using for loop and if...else statement. A positive integer which is only divisible by 1 and itself is known as prime number. For example: 13 is a prime number because it is only divisible by 1 and 13 but, 15 is not prime number because it is divisible by 1, 3, 5 and 15. Output Enter a positive integer: 29 29 is a prime number. 3] write a bash Program to Add Two Numbers. In this program, user is asked to enter two integers. Then, the sum of those two integers is stored in a variable and displayed on the screen. Output Enter two integers: 4 5 4 + 5 - 9 4] write a bash Program to Check Whether Number is Even or Odd. In this program, if...else statement is used to check whether a number entered by the user is even or odd. Output Enter an integer: 23 23 is odd. 5] Write a bash Program to Find Largest Number Among Three Numbers In this example, you'll learn to find the largest number among three numbers using if, if else and nested if else statements or case statements. In this program, user is asked to enter three numbers. Then this program finds out the largest number among three numbers entered by user and displays it with proper message. Output Enter three numbers: 2.3 8.3 -4.2 Largest number: 8.3