arrpractice

1.)
float[] a = new float[24];
int[] b = new int[500];
double[] c = new double[50];
char[] d = new char[10];

2.)
final int CLASS_SIZE = 0;
double[] QuizAvg = new double[CLASS_SIZE];

3.)
1   3   -2
17   6   11
4   2   2
19   14   5
11   15   -4
52   40   12

4.)
10
9
8
7
6
5
4
3

5.)
1
1
1
1
-1
-1
-1
-1

6.)
0
101
2
103
4
105
6
107

7.)
-4
0
2
26
10
12
14

8.)
Count is not properly initialized and the keybd variable is not properly initialized as a Scanner.

int i;
int count[] = new int[10];
Scanner keybd = new Scanner(System.in);
System.out.println("please enter 10 numbers:  ");
for (i = 1; i <= 10; i++) {
    count[i] = keybd.nextInt();
}


9.)

int[] arr = new int[50];

for (int i = 0; i < arr.length; i++) {
    arr[i] = new Random().nextInt(150);
}

for (int i = 0; i < arr.length; i++) {
    arr[i]*=2;
}

for (int i = 0; i < arr.length; i++) {
    System.out.println(arr[i]);
}


10.)
int[] arr = new int[25];
int sum = 0;
ArrayList<Integer> evenNumbers =  new ArrayList<Integer>();

for (int i = 0; i < arr.length; i++) {
    arr[i] = new Random().nextInt(150);
}

for (int i = 0; i < arr.length; i++) {
    if((i % 2) == 0) {
        evenNumbers.add(arr[i]);
    }
}

for (int i = 0; i < evenNumbers.size(); i++) {
    sum += evenNumbers.get(i);
}

System.out.println("Sum: " + sum);



11.)
int[] arr = new int[25];
int sum = 0;
ArrayList<Integer> evenNumbers =  new ArrayList<Integer>();

for (int i = 0; i < arr.length; i++) {
    arr[i] = new Random().nextInt(150);
}

for (int i = 0; i < arr.length; i++) {
    if((arr[i] % 2) == 0) {
        evenNumbers.add(arr[i]);
    }
}

for (int i = 0; i < evenNumbers.size(); i++) {
    sum += evenNumbers.get(i);
}

System.out.println("Sum: " + sum);

12.)
50  45  40  35  30  25  20  15  10  5  
5  10  15  20  25  30  35  40  45  50  
5   5   5   5   5   5   5   5   5   5   

13.)
50  45  40  35  30  25  20  15  10  5  
5  10  15  20  25  30  35  40  45  50  
5   5   10   15   20   25   30   35   40   45   

14.)
int temps[] = new int[50];

for (int i = 0; i < temps.length; i++) {
    temps[i] = new Random().nextInt(120);
}

for (int i = 0; i < temps.length; i++) {
    if (temps[i] == 100) {
        System.out.println("yes");
    }
}


15.)
int temps[] = new int[50];
boolean found = false;

for (int i = 0; i < temps.length; i++) {
    temps[i] = new Random().nextInt(120);
}

for (int i = 0; i < temps.length; i++) {
    if (temps[i] == 100) {
        found = true;
    }
}