Input an email from the user. You have to create a username from the email by deleting the part that comes after ‘@’. Display that username to the user.

Example : 

email = “mejona@gmail.com” ; username = “mejona” 

email = “helloWorld123@gmail.com”; username = “helloWorld123”

What is Mejona ?

Write a function to calculate the factorial of a number.

Define Computer Architecture. Explain three aspects of computer-design ? 

Origin of soil

Define arrays. Explain review of arrays ?