Talking to the user — input() and print()

input() — ask a question

name = input("What's your name? ")
print(f"Hello, {name}!")

When this runs in a script or terminal, the prompt appears, the program pauses, the user types something, hits Enter, and the typed text is stored in name. Always as a string — even if they typed digits.

print() — talk back

print("Hello")
print("a", "b", "c")           # a b c
print("a", "b", "c", sep="-")  # a-b-c
print("first")
print("second")
print("third", end=" ")
print("on the same line")

A complete mini-program

# tip_calculator.py
bill = float(input("Bill amount: "))
tip_pct = float(input("Tip percent: "))
people = int(input("How many people? "))

tip = bill * tip_pct / 100
total = bill + tip
per_person = total / people

print()
print(f"Total: ${total:,.2f}")
print(f"Each:  ${per_person:,.2f}")