Code Practice with Arrays¶
Fix the
Test1
program to print the values in the arraya1
starting with the value at the last index and then backwards to the value at the first index.Rewrite the
Test2
program so that it prints all the values in an arrayarr1
using a for-each loop instead of afor
loop.Finish the
Test3
program so that it prints out all of the odd values in the arraya1
.Finish the
Test4
program to print the strings at the odd indices in the array.
In the Test5
program, replace the “ADD CODE HERE” with the code to declare and initialize a two-dimensional String array called students
with the names “Brice, Marvin, Anna” in the first row and “Kamal, Maria, Elissa” in the second. The finished code will print all the names in the array starting with all in the first row followed by all in the second row.
In the Test6
program, print the values 47, 51, and 20 by accessing them in the the given two-dimensional array.
In the Test7
program, print the values 8, 3, 87, and 34 by accessing them from the given two-dimensional array.
In the Test8
program, print the number of rows in the given two-dimensional array, or the length of the outer array. Then print the number of columns, or the length of each inner array.
Ex. The array { {“hello”,”there”,”world”},{“how”,”are”,”you”} } should print:
Rows: 2
Columns: 3
In the Test9
program, loop through the given two-dimensional array, printing out the values in the first row followed by those in the second row and so on.
In the Test10
program, declare and create a two-dimensional array of strings named colors
. Put the colors (“red”, “yellow”, “blue”) in the first row, and the colors (“orange”, “green”, “purple”) in the second row. Then print every value in the array.
Replace the “ADD CODE HERE” in the Test11
program with the code to count and print the number of 7’s that are in the 2d array. It should print 2.
Replace the “ADD CODE HERE” in the Test12
program with the code to print out the sum of the numbers in the second row of the “table” array. It should print 18.
Replace the “ADD CODE HERE” in the Test13
program with the code to find the sum of the values on the diagonal from [0][0] to [num rows - 1][num rows - 1] Print the sum. It should print 5.
Replace the “ADD CODE HERE” in the Test14
program with the code to declare and create a two-dimensional array of integers numbers
with the numbers (1,2,3) in the first row, and the numbers (4,5,6) in the second row. Then loop through the two-dimensional array, printing out the values in the first row followed by those in the second row.
Replace the “ADD CODE HERE” in the Test15
program with the code to declare and create a two-dimensional array of integers numbers
with the numbers (1,2,3) in the first row, the numbers (4,5,6) in the second row, and the numbers (7,8,9) in the third row. Then loop through the two-dimensional array, printing out the values in the first row followed by those in the second row and so on.
In the Test16
program, replace the “ADD CODE HERE” below with the code to replace the word “purple” with “yellow”.