script_23.py - Nested Loops for Matrix

Code

#!/usr/bin/env python3
"""Nested loops for matrix"""

rows = 3
cols = 4

for i in range(rows):
    for j in range(cols):
        print(f"({i},{j})", end=" ")
    print()

Explanation

Line 4-5: Constants - rows = 3 defines number of rows (integer literal) - cols = 4 defines number of columns (integer literal)

Line 7: for i in range(rows): - Outer loop iterates 3 times (0, 1, 2) - i represents row index - Each iteration processes one row

Line 8: for j in range(cols): - Inner loop (nested inside outer) - Iterates 4 times per outer iteration (0, 1, 2, 3) - j represents column index - Total iterations: 3 × 4 = 12

Line 9: print(f"({i},{j})", end=" ") - Prints coordinate pair - end=" " adds space instead of newline - Keeps items on same line - Both i and j are in scope (i from outer, j from inner)

Line 10: print() - Indented under outer loop, not inner loop - Executes after inner loop completes - Prints newline to move to next row - Creates matrix layout:

(0,0) (0,1) (0,2) (0,3)
(1,0) (1,1) (1,2) (1,3)
(2,0) (2,1) (2,2) (2,3)