Minimum Element in Array in C: Program to Find Smallest Element

Introduction

In this tutorial, we will learn how to write a C program to find the minimum or smallest element in an array.

Finding the minimum element in an array is a fundamental programming problem. It is used in many real-world applications, such as:

• Finding the lowest score in a class
• Finding the minimum temperature in weather data
• Finding the smallest number in a list of sales figures
• Finding the minimum value in sensor readings

C Program to Find Minimum Element in Array

#include <stdio.h>

int main() {
    int n, i;
    int min;
    
    // Ask user for number of elements
    printf("Enter the number of elements: ");
    scanf("%d", &n);
    
    // Declare array of size n
    int arr[n];
    
    // Read elements into the array
    printf("Enter %d elements:\n", n);
    for(i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }
    
    // Assume first element is the minimum
    min = arr[0];
    
    // Find minimum element
    for(i = 1; i < n; i++) {
        if(arr[i] < min) {
            min = arr[i];
        }
    }
    
    // Display the minimum element
    printf("\nMinimum element in the array: %d\n", min);
    
    return 0;
}

Sample Output

Enter the number of elements: 5
Enter 5 elements:
10 50 30 40 20

Minimum element in the array: 10

Another Example:

Enter the number of elements: 6
Enter 6 elements:
100 200 50 75 25 150

Minimum element in the array: 25

Program Explanation

Let's break down the code step by step:

1. Include Header File: #include <stdio.h> includes the standard input/output library.
2. Declare Variables:
   • int n; — stores the number of elements
   • int i; — loop counter
   • int min; — stores the minimum element
3. Get User Input: Prompts the user to enter the number of elements and then reads them into the array.
4. Initialize Minimum: min = arr[0]; assumes the first element is the smallest.
5. Find Minimum: The for loop starts from i = 1 and compares each element with min:
   • If arr[i] < min, then update min = arr[i];
6. Display Result: printf("\nMinimum element in the array: %d\n", min); prints the smallest element.
7. Return: return 0; indicates successful program execution.

Algorithm to Find Minimum Element

1. Start
2. Read the number of elements (n)
3. Read n elements into the array
4. Set min = arr[0]
5. For i = 1 to n-1:
   • If arr[i] < min, set min = arr[i]
6. Print min
7. End

#include <stdio.h>

int main() {
    int n, i;
    int max, min;
    
    printf("Enter the number of elements: ");
    scanf("%d", &n);
    
    int arr[n];
    
    printf("Enter %d elements:\n", n);
    for(i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }
    
    max = arr[0];
    min = arr[0];
    
    for(i = 1; i < n; i++) {
        if(arr[i] > max) {
            max = arr[i];
        }
        if(arr[i] < min) {
            min = arr[i];
        }
    }
    
    printf("\nMaximum element: %d\n", max);
    printf("Minimum element: %d\n", min);
    
    return 0;
}

Frequently Asked Questions

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