binary

place values

1    0   1   1   .  0    1 
2^3 2^2 2^1 2^0.   2^-1 2^-2

$2^3$ $2^2$ $2^1$ $2^0$

8 + 0 + 2 + 1 + 1/4

11001 → 25

16 + 8 + 1 = 25

floating point notation

loops...while loops + for loops

while loop

int x = 10;
while (x > 0) {
	System.out.println(x);
	x = x - 1;
}

for loop

for (int x = 10; x > 0; x--) {
	System.out.println(x);
}

loops 2. so which one do i use?

• whichever one makes more sense to you
• longer answer: since the while loop syntax is more flexible, it is often used in cases where the programmer does not know the amout of times the loop will need to execute
• they can be used interchangeabley tho tbh

static classes (integer, etc)