Introduction to Programming

using the Processing language

Lecturer: Maarten Lamers of the Media Technology MSc program at Leiden University
Teaching assistant: Joris Slob
Course developed by Bas Haring (2004)
Alterations by Maarten Lamers (2005, 2006, 2007)

Introduction    Lecture I    Lecture II    Lecture III    Lecture IV    Lecture V    Lecture VI    Lecture VII    Fun

Programming concepts

 Arrays


Reserved words

 
[]	.length
{}	new

Example IV.1

 This code shows the syntax of arrays. It declares and initializes one array of integers, and prints its contents. Note how the index value (variable i) can have value 0, but must always remain smaller than a.length. 

int[] a = {23, 4, 19, 68};

print (a[0]);
print (" ");
println (a[1]);

for (int i=0; i < a.length; i++)
  print (a[i] + " ");
println();

for (int i = a.length-1; i >= 0; i--)
  print (a[i] + " ");
println();


Assignment IV.1

 Make a program that prints the numbers 1 to 20 in random order, but prints each value only once.