6. Given the two dimensional array below: public class Class1 { public static vo

Question

6. Given the two dimensional array below:

public class Class1 {

public static void main (String [] args) {

int[][] list = { {9, 8},

{6, 5},

{3, 2},

{7, 7} };

}

}

a. What is the value of list.length _______________

b. What is the value of list[0].length _______________

c. Hand-write a loop to print every element of the array, list, (4 rows and 2 columns of output)

D.Hand-write a loop to print every element of the second row of the Array

e. Hand-write a loop to print every element of the first column of the Array

f. How would you sum all the elements of the Array? Hand-write a loop to do so.

g. How do you find the max or the min in the array? Hand-write a loop to do so.

h. How do you sum the elements of a column of an array? Hand-write a loop to do so.

i. How do you sum the elements of a row of an array? Hand-write a loop to do so.

Explanation / Answer

a. 4

b. 2

c.

int i,j;
for(i=0;i<4;i++){
for(j=0;j<2;j++)
System.out.print(list[i][j]+" ");
}

d.

int j;

for(j=0;j<2;j++){

System.out.print(list[1][j]+" "); // second row of an array has the index as 1, so we are using 1.
}

e.

int i;

for(i=0;i<4;i++){
System.out.print(list[i][0]+" ");
}

f.

int sum =0;
for(i=0;i<4;i++){
for(j=0;j<2;j++){
sum+=list[i][j];
}
}
System.out.println("sum of the elements of the list "+sum);

g.

int maximum = Integer.MIN_VALUE;
int minimum = Integer.MAX_VALUE;

for(int i = 0; i < list.length; i++) {
Arrays.sort(list[i]); // to use this inbuilt function ,you need to import Array class using "import java.util.Arrays;"

if(list[i][0] < minimum) minimum = list[i][0];
if(list[i][list[i].length - 1] > maximum) maximum = list[i][list[i].length - 1];
}

System.out.println("Minimum = " + minimum);  
System.out.println("Maximum = " + maximum);

h.

int sum1=0;
for(i=0;i<4;i++){
sum1+=list[i][0]; //1st column has index as 0
}
System.out.println("Sum of the elements of the 1st Column "+sum1);

i.

nt sum2=0;
for(j=0;j<2;j++){
sum2+=list[1][j]; // 2nd row has index as 1
}
System.out.println("Sum of the elements of the 2nd Row "+sum2);

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