***Age Checker Program in Java***

A Smarter Way to Classify Life Stages 

Introduction

Age is more than just a number — it's a marker of life’s progress, from the cradle to the grand stage of elderhood. Whether you’re designing healthcare apps, educational systems, or user-personalized experiences, understanding where someone is in life matters. That’s exactly why I built this Age Checker program in Java — a tool that accurately classifies individuals based on their age, using official medical and sociological standards.

No guessing, no vague categories — just precise, respectful, and informative classifications that cover everyone from Toddler to supercentenarians.

What the Program Does

The Age Checker takes a user’s input (their age in years), runs it through a structured classification system, and displays a message telling them what life stage they’re in — like “Toddler,” “Young Adult,” “Mature Adult,” or “Octogenarian.”

The purpose? To simulate a real-world age classification system, the kind used in medicine, education, demographics, and even tech platforms that cater content based on age.

How the Program Works (In Plain English)

Here’s the thought process behind the program:

  1. User Input: The program prompts the user to enter their age.

  2. Validation: It checks if the input is a valid number (no negatives, no weird inputs).

  3. Classification Logic: It compares the age against a detailed range of age brackets.

  4. Output: It displays the exact life stage — using medically and culturally recognized terms.

The logic is powered by age brackets like these:

Age Classification Table Used in This Program

This classification isn’t random — it’s pulled from real-world data used in hospitals, research papers, and even global demographic reports.

Why This Matters

Real-World Relevance:

  • In healthcare: age determines care levels.

  • In education: age shapes learning stages.

  • In user experience: platforms like YouTube or TikTok restrict features based on age.

  • In research: governments track age brackets to allocate resources.

By writing this program, I wanted to replicate that structured thinking — training myself to code like real systems work.

What Makes This Program Stand Out

  • Uses formal age ranges, not vague or random groupings.

  • Based on real data, not assumptions.

  • Provides respectful, informative output — every person gets classified with dignity.

  • Expandable — you could easily add new features like age-specific advice, tips, or even icons.

Final Thoughts

This Age Checker is more than just a Java project — it’s a tool that respects how we grow, how we age, and how we describe ourselves at different stages of life. It’s structured, thoughtful, and practical — the kind of program that belongs in real-world applications.

From newborns to supercentenarians — we all fit in somewhere. And with this tool, your program will know exactly where that is.

IMPLEMENTATION

import java.util.Scanner; // create access to the scanner class

public class LifeStage {
    public static void main(String[] args) {
        Scanner justin = new Scanner(System.in);
        System.out.println("WELCOME TO THE AGE RANGE TELLER PROGRAM");
        System.out.print("Enter Your Age: "); // accepting the users age
        int age = justin.nextInt(); // storing the age
        // Using esle if Statement to display the users age range due to the age being
        // stored
        if (age == 1 && age <= 3) {
            System.out.println("1-3 years\tToddler\tEarly Childhood\tEarly exploration phase, walking , talking chaos stage");
        } else if (age == 3 && age <= 5) {
            System.out.println("3-5 years\tPreschooler\t \tGrowth of social Skills");
        } else if (age == 6 && age <= 11) {
            System.out.println("6-11 years \tChild / Middle Childhood\tSchool-Age\tFormal education begins");
        } else if (age == 0 && age <= 12) {
            System.out.println("0-12 years\tChildhood\t\tPhysical and Cognitive development, full dependency");
        } else if (age == 12 && age <= 18) {
            System.out.println("12-18 years\tAdolescent\tTeenager\\youth\tPuberty and AL identity");
        } else if (age == 13 && age <= 24) {
            System.out.println("13-24 years\tYouth\t\tIdentity independence, exploration, rebellion – the struggle is real");
        } else if (age == 19 && age <= 24) {
            System.out.println("19-24 years\tYoung Adult\tLate Adolescent\tCareer and independence start");
        } else if (age == 25 && age <= 35 ) {
            System.out.println("25 - 35 years\t Adult\tQuarter-life zone\tlife responsibilities grow\r\n + \tStability responsibility, contribution on to society");
        } else if (age == 36 && age <= 44 ) {
            System.out.println("36-44 years\tMid Adult\tCareer and family building");
        } else if (age == 45 && age <= 59 ) {
            System.out.println("45-59 years\tMature Adult\tMiddle-aged adult\tHealth awareness increases");
        } else if (age == 60 && age <= 69 ) {
            System.out.println("60-69 years\tSenior Adult\tSexagenarian - From Latin sexagenarius, Meaning in 60s.\tRetirement preparation, wisdom unlocked");
        } else if (age == 60 && age <= 69 ) {
            System.out.println("70-79 years\tElderly\tSeptuagenarian - Latin – based term for someone in their 70s\tGrandparent mode unlocked");
        } else if (age == 80 && age <= 89 ) {
            System.out.println("80-89 years\tVery Elderly\tOctogenarian\tLegendary wisdom");
        } else if (age == 90 && age <= 99 ) {
            System.out.println("90-99 years Aged / Old-old  Nonagenarian    Rare and respected");
        } else if (age == 100 && age <= 109 ) {
            System.out.println("100- 109 years\tCentenarian\tCentenarian\tTriple- digit heroes");
        } else if (age == 110 && age <= 119 ) {
            System.out.println("110-119 years\tSupercentenarian\tSupercentenarian\tExtraordinary Humans");
        } else if (age >= 120 ) {
            System.out.println("120+ years\tUltra-aged\tStill Supercentenarian\tRecord breakers");
        } else {
            System.out.println("NOT A AGE")
        }

        justin.close();
    }
}

/*UMARU JUSTIN ROGERS
I-24-6999
INFORMATION TECHNOLOGY*/

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