C Programs

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Decision Making Programs in C

Check whether a person is eligible to vote

Introduction

In many countries, a person is eligible to vote if their age is 18 years or older.

This program will:

1. Take a person’s age as input.
2. Check if they are eligible or not using if-else.
3. Display the appropriate message.

C Program: Check Voting Eligibility

#include <stdio.h>
 
int main() {
    int age;
 
    // Input age
    printf("Enter your age: ");
    scanf("%d", &age);
 
    // Check eligibility
    if (age >= 18) {
        printf("You are eligible to vote.\n");
    }
    else if (age >= 0 && age < 18) {
        printf("You are not eligible to vote. You must be at least 18 years old.\n");
    }
    else {
        printf("Invalid age entered.\n");
    }
 
    return 0;
}
 

 
OUTPUT :

Enter your age: 20
You are eligible to vote.

Enter your age: 16
You are not eligible to vote. You must be at least 18 years old.

Enter your age: -5
Invalid age entered.

Explanation

1. User inputs their age.
2. If age >= 18, the person is eligible.
3. If 0 ≤ age < 18, the person is not eligible.
4. If age is negative or invalid, program displays an error message.