AP Computer Science A Unit 1

hello world

skeleton code

skeleton code

the basic starting point of a program

\”

What is the escape sequence for “

\\

What is the escape sequence for \

backslash

What is this “\”

forward slash

What is this “/”

\t

What escape sequence performs a tab

\n

What escape sequence moves the cursor to the next line

System.out.println();

Which print command prints the supplied text and moves the cursor to the beginning of the next line

System.out.print();

Which print command prints the text without going to the next line?`

/*

What symbol starts a multi-line comment

//

What symbol is used for a single line comment

*/

What symbol ends a multi-line comment

Comment

A(n) BLANK is a section of code that is ignored by the compiler

public static void main(String[] args)

What does skeleton code look like?

Public class Examples
{
public static void main(String[] args)
{
 System.out.println("bobo");
}
}

// What does the code print?

bobo

Public class Examples
{
public static void main(String[] args)
{
 //System.out.println("bobo");
}
}

// what is the result of executing this code?

nothing will print

Public class Examples
{
public static void main(String[] args)
{
 System.out.println(:P);
}
}
// what type of error does this produce

Syntax error

Public class Examples
{
public static void main(String[] args)
{
 System.out.print("bobo\neats\ndc");
}
}
// what does this code execute?

bobo

eats

dc

int count = 57;

how do you declare an integer value named count with the value of 57?

double gpa = 3.9;

how do you declare a decimal value named gpa that holds a students gpa?

String name = “John Harvard”;

how do you create an object called name that holds a students' name?

count = count + 2;

OR

count+=2;

how do you change the value of an int named count up by 2?