The main() function uses a switch statement to print the day of the week based on a numeric value from 1 to 7.

• Declares an integer variable dayNumber and assigns it the value 3 (you can change it to test other days).

• The switch statement checks the value of dayNumber and matches it with one of the case labels.

• Each case corresponds to a day of the week:

  • 1 → Monday

  • 2 → Tuesday

  • 3 → Wednesday

  • 4 → Thursday

  • 5 → Friday

  • 6 → Saturday

  • 7 → Sunday

• The break statement prevents execution from continuing into the next case once a match is found.

• If the number doesn’t match any case, the default block runs and prints "Invalid number. Please enter a number from 1 to 7."

• Ends with return 0; to indicate successful program completion.