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C Program to Check Prime Number Using Efficient Logic

  Introduction A prime number is a number that has exactly two distinct positive divisors: 1 and itself. In this program, we check whether a given number is prime or not using a simple and efficient logic. This type of program is commonly used in mathematics, competitive programming, and basic algorithm learning for beginners in C programming. Problem Statement The task is to write a C program that determines whether a given integer is a prime number or not. The program takes a single integer input from the user and analyzes its divisibility. If the number has no divisors other than 1 and itself, it should be identified as a prime number; otherwise, it is not prime. This problem is important in number theory and has practical relevance in areas such as cryptography, data validation, and algorithm design.  Algorithm / Logic Explanation To check whether a number is prime, we need to verify that it is not divisible by any number other than 1 and itself. The algorithm follows a si...

Find Minimum and Maximum in 2D Array - C Program

Find Minimum and Maximum in 2D Array - C Program

✅ Find Minimum and Maximum in 2D Array - C Program

#include <stdio.h>

int main() {
    int row, col;

    // Input number of rows and columns
    printf("Enter number of rows and columns:\n");
    scanf("%d %d", &row, &col);

    int arr[row][col];

    // Input 2D array elements
    printf("Enter %d elements:\n", row * col);
    for(int i = 0; i < row; i++) {
        for(int j = 0; j < col; j++) {
            scanf("%d", &arr[i][j]);
        }
    }

    // Initialize min and max with the first element
    int min = arr[0][0];
    int max = arr[0][0];

    // Traverse the array to find min and max
    for(int i = 0; i < row; i++) {
        for(int j = 0; j < col; j++) {
            if(arr[i][j] < min) {
                min = arr[i][j];
            }
            if(arr[i][j] > max) {
                max = arr[i][j];
            }
        }
    }

    // Print results
    printf("Minimum element = %d\n", min);
    printf("Maximum element = %d\n", max);

    return 0;
}
  

๐Ÿ“˜ Explanation:

This C program reads a 2D array (matrix) from the user, then traverses all its elements using nested loops to determine the minimum and maximum values. The min and max variables are initialized with the first element, and the program compares each subsequent value to update these accordingly. This logic is useful for matrix-based problems in C, including search, statistics, and data processing.

๐Ÿงพ Sample Output:

Enter number of rows and columns:
2 3
Enter 6 elements:
5 7 1 9 4 2
Minimum element = 1
Maximum element = 9
  

๐Ÿ”‘ Keywords:

2D Array in C, Matrix traversal, Find min in matrix, Find max in matrix, C program array problem, Nested loop logic in C

๐Ÿ“Œ Hashtags:

#CProgramming #2DArray #MatrixMinMax #BeginnerC #ArrayTraversal #CodingPractice

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