C program to find the largest element in an array using simple iteration

January 03, 2026

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 Largest Element in an Array (C Program)

#include<stdio.h> int main( ) { int num,a[100]; printf("Enter the size of the array:\n"); scanf("%d",&num); if(num<=0) { printf("Invalid array size"); return 1; } printf("Enter %d elements into the array:\n", num); for(int i=0;i<num;i++) { scanf("%d",&a[i]); } int max=a[0]; for(int i=0;i<num;i++) { if(a[i]>max) { max=a[i]; } } printf("The largest element in array is %d\n",max); }

📘 Explanation:

🔹 The program first reads the size and elements of the array.
🔹 It initializes `max` with the first element.
🔹 Then it iterates through all elements and updates `max` whenever a larger value is found.
🔹 Finally, it prints the largest element.

🧪 Sample Output:

Enter the size of the array:
5
Enter 5 elements into the array:
10 45 23 89 34
The largest element in array is 89

🏷️ Keywords:

C program largest element, find max in array, array maximum value, beginner array program, C logic for max element

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C Program to Check Prime Number Using Efficient Logic