Final answer:
To copy values from one 3x3 integer array to another, a nested for-loop is used in Python to iterate over the elements and assign values from the first array to the second.
Step-by-step explanation:
The student has asked for code to copy values from one 3x3 integer array, x1, to another, x2. To achieve this, you can use a nested for-loop structure to iterate over each element of the arrays and assign the values from x1 to x2. Here's an example in Python:
x1 = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
x2 = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
for i in range(3):
for j in range(3):
x2[i][j] = x1[i][j]
This code will copy every value from x1 to the corresponding element in x2. Remember to adjust the indices if your arrays have a different size or structure.