1. Variables and Arithmetic

2. From last class More drawing functions:
strokeWeight(n); // higher the n value broader the stroke
fill(k) ; // single parameter for fill gives you grey scale capablity
Second parameter to stroke and fill is for transparency
noFill();
noStroke();
smooth();
noSmooth();
Few others we will learn as we go along

3. Topics: pages 37-50
Section: Data1: variables; Section: Math1: Arithmetic, functions
Data types: int, float, Boolean
Assignment operator =
Width, height
Boolean values: true, false
Arithmetic functions: variables, operators, expression

4. Data Types Data is the representation of real world items Example:
int numStudents; // number of students
float avgScore; // average score in an exam: 88.86
boolean hot; //condition of “hot” can be false or true
char middleInitial; // middle initial in the name of a student
Syntax or “format” for specifying a variable is:
<type> <name>

5. Assigning values
int numStudents; numStudents = 162; float avgScore; avgScore = 76.5; print(“ This is CSE113 Spring 2015”); println(“Average score for the class is: “ + avgScore);

6. size function Size function sets the variable width and height
When you say
size(300,400); // sets a variable width = 300, height = 400
You can use these variables in your programming/code
Example:
line(0, height, width, 0);

7. Arithmetic Add + Subtract - Multiply *
Divide / (this gives the quotient of division)
Modulus % (this gives the remainder of division)
Lets do the exercises in pages 44-46

8. Operator Precedence Multiplicative * / % Additive + - Assignment =
If two operators are of equal precendece: evaluate them left to right
Example: a = 5; c = 8; b = 10
int x = a + b * c;
int y = a – b + b/a;

9. Constraining numbers ceil() floor() round() min() max()
Examples: int x = ceil(3.1); // x = 4
int y = floor(4.8); // y = 4
int w = round(3.1) // w = 3
int z = round (3.9); // w = 4

10. Example for min and max
Min and max functiosn take a list of data as parameters
Lets work out your overall percentage for the course using these functions.
Problem statement: Define variables for the 3 exams, 4 quizzes, 5 labs and write a expressions to compute the overall percent.

11. Overall Course Grade
int ex1, ex2, ex3; int q1, q2, q3, q4; int lab1, lab2, lab3, lab4, lab5; int ex, quiz, lab; ex = ex1 + ex2 + ex3 – min(ex1, ex2); quiz = q1+ q2 + q3 + q4 – min(q1,q2,q3,q4); lab = lab1 + lab2 + lab3 + lab4 – min(lab1, lab2, lab3, lab4) + lab5; float overallPercent = ex *0.6 + lab* quiz*0.15; int percent = round(overallPercent);

12. Summary We studied Variables Arithmetic operations
Arithmetic expressions
Predefined constraining functions such as min(), max(), ceil() etc.