Perl Programming/Exercise 1

Getting started, displaying text
Task: Create a Perl program which displays "Hello world" and then exits.

Displaying numbers
Try doing these few excercises yourself
 * Put the number 4000/7 into a variable, and display it on screen.
 * Adapt the program to display the number to 3 decimal places. (Hint: The well-known printf works in Perl!)
 * Adapt the program to round up if the last decimal place is greater than 5
 * Adapt the program to display the number with leading zeros
 * Adapt the program to show a + sign if the number is positive, and check that it correctly displays a - sign if you subtract 1000 from the number.

Functions
Write a function to calculate the roots of a Quadratic equation, where you give the coefficients a,b,c to the function, and it returns both the values of x

Putting it all together
Put together these programs into one which:
 * Displays a title on screen
 * Creates 3 random numbers (a,b,c)
 * Displays those numbers neatly formatted
 * Uses those numbers as the coefficients of a quadratic equation, calculates and displays both roots.

Answers

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