1. Methods & Functions

2. Methods
A function is a code block containing a series of statements that are focused on producing a single result
Functions differ from methods in that they return a value. The value type is predefined in the declaration of the function.
Every function must contain at least one return statement outside of a conditional

3. int[] searchArray = new int[50]; //Create a new array of size 50//
void setup() {
size(500,500);
if( initArray(searchArray)){
find(50); //call find functions to find certain values
find(12);
find(76); }
boolean initArray(int[] s)
for(int j=0; j < s.length; j++)
s[j] = random(1,100); //initialize array to random numbers
return true;
void find(int searchKey)
boolean isFound = false; //set a 'flag' to see if we found the value
for (int i = 0; i < searchArray.Length; i++) //loop through entire array values
if (searchKey == searchArray[i]) //check for a match
text("Found “ + str(searchKey) + ” at " + str(i), 100, 100); //write to console index of found value
isFound = true;
if(!isFound) //write out msg to console if we didn't find the value
text("Sorry, could not find " + str(searchKey) + " in array", 100, 100);
}// find

4. Methods vs Functions Method Function int squareANumber(int number)
No return type
Method name
Parameter(s)
void squareANumber(int number) {
int square = number * number;
text(str(square),100, 100); }
int squareANumber(int number)
return number * number;
Function
Integer return type
Function name
Parameter(s)
Return statement

5. Functions - return statement
At least one return statement must exist outside of a conditional
int getValue() {
if(!blocked)
return -1; }
return value;

6. Task
1. Write a small program that declares an int array called grades. This array will be of size 10 integer grade numbers (between 0 and 100)
2. Write a second array of strings called students. Initialize this second array manually with 10 names (“last, first”) of your choice.
For the program write a method or function:
a) void init() that initializes grades to random integers.
b) void print() that writes the names of the students and their grade
c) void set(int grade, String student) that sets a certain student’s grade to a specified grade
d) int get(String student) that gets and returns a certain student’s grade
e) void sort() that sorts the grades from lowest to highest