Write a program that asks the user to enter their name and age. Print a message addressed to the user that tel

Exercises · Q19

Q. Write a program that asks the user to enter their name and age. Print a message addressed to the user that tells the user the year in which they will turn 100 years old.

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Concept understanding — String Input Type

String Input Type — First Encounter

Imagine you're writing a program that asks someone for their name. The user types "Ravi" and presses Enter. What just arrived inside your program? A string — a sequence of characters: 'R', 'a', 'v', 'i'.

A string input type is simply the mechanism by which a program reads a sequence of characters (letters, digits, spaces, punctuation) from the user, all at once, until the user presses Enter (or some other delimiter). The program stores that entire sequence as a single piece of data — a string.

The intuition

Think of a string as a word or sentence that the user types. Unlike a number input (which expects something like 42 and rejects hello), a string input happily accepts anything: "123", "hello world", "Ravi@2024", even " " (spaces). It does not try to interpret what was typed — it just records the characters exactly as given.

Note

In most programming languages, when you read a string input, the Enter key is not stored as part of the string. It only signals "I'm done typing." So if the user types Ravi and presses Enter, the string is "Ravi", not "Ravi\n".

The precise statement

A string input type is a data type that accepts a sequence of zero or more characters from an input stream (typically the keyboard) and stores them as a string object. The input is delimited by a newline character (Enter) unless otherwise specified. The string can contain any printable characters, including digits and spaces, and is treated as literal text — not as a numeric value or any other type.

In code, it looks like this (Python example):

name = input("Enter your name: ")
# User types: Ravi
# name now holds the string "Ravi"

What makes it different from other input types

Input type	What it reads	Example user input	Stored as
String	Any characters until Enter	`42`	`"42"` (text, not the number 42)
Integer	Only digits (and optional sign)	`42`	`42` (the number)
Float	Digits with decimal point	`3.14`	`3.14` (the number)

The critical distinction: string input preserves the exact characters typed. If you ask for age and the user types "twenty", a string input stores "twenty". An integer input would crash or reject it.

A common first confusion …

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The year they turn 100 is: current year + (100 − age). Get the current year from the datetime module:

import datetime
name = input("Enter your name: ")
age = int(input("Enter your age: "))
year = datetime.date.today().year + (100 - age)
print(name + ", you will turn 100 years old in the year", year)

Sample run (in 2026):

Enter your name: Arnab …

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Read name and age, then print current-year + (100 − age) — a 19-year-old in 2026 turns 100 in 2107. Remember input() gives a string, so age needs int().

Two concepts combine here: input always returns a string (so the age must be converted with int() before arithmetic), and simple date arithmetic — if you are age now, you need 100 - age more years, so the target year is the current year plus that.

# In which year will the user turn 100?
import datetime

name = input("Enter your name: ")
age = int(input("Enter your age: "))

current_year = datetime.date.today().year
year_100 = current_year + (100 - age)

print(name + ", you will turn 100 years old in the year", year_100)

Key lines:

int(input(...)) — without it, 100 - age raises a TypeError (string minus int).
datetime.date.today().year fetches the real current year, so the program stays correct every year. (A simpler classroom version may hard-code, say, current_year = 2026 — acceptable, but it goes stale.)
name + ", you will…" — string concatenation personalises the message.

Sample run (example, assuming it is run in 2026):

Enter your name: Arnab
Enter your age: 19 …

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Q.Write a program that asks the user to enter their name and age. Print a message addressed to the user that tells the user the year in which they will turn 100 years old.

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