Programs to find the age group of a given age are shown here. The age group is calculated according to the age provided by the user. The following table depicts the age groups and the ranges of the ages.
| Age Group | Age Ranges |
|---|---|
| Baby | More than 0 to below 2 |
| Child | 2 to below 13 |
| Adolescent | 13 to below 18 |
| Adult | 18 to below 60 |
| Old | 60 or more |
For example, if the age of person A and person B are 45 and 10 respectively, then person A is an adult and person B is a child.
Page content(s):
1. Algorithm to find the age group
1. Take the age as input.
2. If the age is less than or equal to 0, display the age as invalid.
3. If the age is more than 0 and below 2, display the age group "Baby" as the output.
4. If the age is between 2 and below 13, display the age group "Child" as the output.
5. If the age is between 13 and below 18, display the age group "Adolescent" as the output.
6. If the age is between 18 and below 60, display the age group "Adult" as the output.
7. If the age is 60 or more, display the age group "Old" as the output.
2. Pseudocode to find the age group
Input : An age value $s$
Output : The age group of $s$
1. Procedure ageGroup($s$):
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14. End Procedure
3. Time complexity to find the age group
Time Complexity: O(1)
4. Program to find the age group
In this section, the C, C++, Java, Python and C# programs to find the age group w.r.t the input age are given. A valid age should be greater than 0.
4.1. C Program to find the age group
/******************************** alphabetacoder.com C program to find the age group *********************************/ #include <stdio.h> int main() { // declare variables double age; // take input printf("Enter the age: "); scanf("%lf", & age); // find the grade if (age <= 0) printf("Invalid age!"); else if (age < 2) printf("Age group: Baby"); else if (age < 13) printf("Age group: Child"); else if (age < 18) printf("Age group: Adolescent"); else if (age < 60) printf("Age group: Adult"); else printf("Age group: Old"); return 0; }
Output
Case 1:
Enter the age: 95
Age group: Old
Case 2:
Enter the age: 1.5
Age group: Baby
Case 3:
Enter the age: 11
Age group: Child
4.2. C++ Program to find the age group
/******************************** alphabetacoder.com C++ program to find the age group *********************************/ #include <iostream> using namespace std; int main() { // declare variables double age; // take input cout << "Enter the age: "; cin >> age; // find the grade if (age <= 0) cout << "Invalid age!"; else if (age < 2) cout << "Age group: Baby"; else if (age < 13) cout << "Age group: Child"; else if (age < 18) cout << "Age group: Adolescent"; else if (age < 60) cout << "Age group: Adult"; else cout << "Age group: Old"; return 0; }
Output
Case 1:
Enter the age: 45
Age group: Adult
Case 2:
Enter the age: 22.4
Age group: Adult
Case 3:
Enter the age: 15
Age group: Adolescent
4.3. Java Program to find the age group
/********************************** alphabetacoder.com Java program to find the age group ***********************************/ import java.util.Scanner; public class Main { public static void main(String[] args) { // declare variables double age; // declare instance of Scanner class Scanner sc = new Scanner(System.in); // take input System.out.print("Enter the age: "); age = sc.nextDouble(); // find the grade if (age <= 0) System.out.print("Invalid age!"); else if (age < 2) System.out.print("Age group: Baby"); else if (age < 13) System.out.print("Age group: Child"); else if (age < 18) System.out.print("Age group: Adolescent"); else if (age < 60) System.out.print("Age group: Adult"); else System.out.print("Age group: Old"); } }
Output
Case 1:
Enter the age: 77
Age group: Old
Case 2:
Enter the age: -2
Invalid age!
Case 3:
Enter the age: 18
Age group: Adult
4.4. Python Program to find the age group
# ************************************ # alphabetacoder.com # Python program to find the age group # ************************************ # take input age = float(input("Enter the age: ")) # find the grade if age <= 0: print("Invalid age!") elif age < 2: print("Age group: Baby") elif age < 13: print("Age group: Child") elif age < 18: print("Age group: Adolescent") elif age < 60: print("Age group: Adult") else: print("Age group: Old")
Output
Case 1:
Enter the age: 32
Age group: Adult
Case 2:
Enter the age: 14
Age group: Adolescent
Case 3:
Enter the age: 13
Age group: Adolescent
4.5. C# Program to find the age group
/******************************** alphabetacoder.com C# program to find the age group *********************************/ using System; namespace AgeGroup { class Program { static void Main(string[] args) { // declare variables double age; // take input Console.Write("Enter the age: "); age = Convert.ToDouble(Console.ReadLine()); // find the grade if (age <= 0) Console.WriteLine("Invalid age!"); else if (age < 2) Console.WriteLine("Age group: Baby"); else if (age < 13) Console.WriteLine("Age group: Child"); else if (age < 18) Console.WriteLine("Age group: Adolescent"); else if (age < 60) Console.WriteLine("Age group: Adult"); else Console.WriteLine("Age group: Old"); // wait for user to press any key Console.ReadKey(); } } }
Output
Case 1:
Enter the age: 40
Age group: Adult
Case 2:
Enter the age: 16.5
Age group: Adolescent
Case 3:
Enter the age: 1
Age group: Baby