LAB #1:
LOOPS
PART 1: Exercises
1. How
many times will the loop execute in the following exercises? For each – what is
the output?
//1
int
x1 = 100;
while(x1 >
0) {
System.out.print(x1
/ 10 + " ");
x1 /= 2;
}
System.out.println();
//2
int
x2 = 2;
do {
System.out.print(x2
+ " ");
x2 *= x2;
} while(x2 < 200);
System.out.println();
//3
int
x3 = 250;
while(x3 % 3
!= 0) {
System.out.print(x3
+ " ");
}
System.out.println();
//4
int
x4 = 10;
while(x4 <
10) {
System.out.print(x4
+ " ");
x4 --;
}
System.out.println();
//5
int
x5 = 1;
while(x5 <
100) {
System.out.print(x5
+ " ");
x5
+= 10;
}
System.out.println();
//6
for(int i = 0; i
<= 2; i++) {
for(int j = 1; j <= 4; j++) {
for (int k = 1; k <= 5; k++) {
System.out.print("*");
}
System.out.print("#");
}
System.out.println();
}
2. Write
if statements to indicate the season based on 2 variables for month (assume
integer 1-12) and day (assume integer (1-31). The rules are:
12/16 –
3/15 à winter
3/16 – 6/15 à
spring
6/16 – 9/15 à
summer
9/16 –12/15 à
fall
SOLUTION:
int
day, month;
...
PART 2: Programming
1.
Task: Suppose you are
writing a game-playing program that involves 2-digit numbers, each number being
composed of 2 different digits. Test if whether numbers entered in a sequence
are accepted to be used in this game. Test for errors in input (including type)
SAMPLE OUTPUT: