Question: Here is a practice problem: loop problem.
Solution. (Don't access until you've tried the problem.)

// initialize array named primes to the first 7 primes
int[] primes = {2, 3, 5, 7, 11, 13, 17};

Question: Use a for loop to add up the squares of the primes stored in the array in 2 above. Print the sum.
Solution. (Don't access until you've tried the problem.)

int[] a = new int[25];
for (int i = 0; i < a.length; i++)
   a[i] = 0;

Question: Here is a practice problem: Problem involving arrays.
Solution. (Don't access until you've tried the problem.)

Question: Here is a practice problem: Problem involving strings.
Solution. (Don't access until you've tried the problem.)

Question: Here is a practice problem: Problem involving classes.
Solution. (Don't access until you've tried the problem.)

Question: Here is a practice problem: 12 days of Christmas.
Solution. (Don't access until you've tried the problem.)

Question: Here is an approximation problem: Approximate pi.
Solution. (Don't access until you've tried the problem.)