C program to find the largest number in an array

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In this example, you will learn to display the largest element entered by the user in the array.

To understand this example, you should understand the followingC programming languageTopic:

• C for loop

• C array

Find the largest element in the array

#include <stdio.h>
int main() {
　　　　int i, n;
　　　　float arr[100]);
　　　　printf("Enter the number of elements (1　-　100): ");
　　　　scanf("%d", &n);
　　　　for (i = 0; i < n;　++i) {
　　　　　　　　printf("Enter number %d: ", i　+　1);
　　　　　　　　scanf("%f", &arr[i]);
　　　　}
　　　　//Store the largest number in arr[0]
　　　　for (i =　1; i < n;　++i) {
　　　　　　　　if (arr[0] < arr[i])
　　　　　　　　　　　　arr[0] = arr[i];
　　　　}
　　　　printf("The largest number is = %.2f", arr[0]);
　　　　return 0;
}

Output result

Enter the number of elements (1　-　100):　5
Enter a number　1:　34.5
Enter a number　2:　2.4
Enter a number　3:　-35.5
Enter a number　4:　38.7
Enter a number　5:　24.5
The largest number is =　38.70

The program gets n elements from the user and stores them in arr[].

To find the largest element,

• Check the first two elements of the array and place the larger value in arr[0].

• Check the first and third elements and place the larger of the two in arr[0].

• This process continues until the first and last elements have been checked

• The largest number will be stored at the arr[0] position

We use the for loop to complete this task.

for (i =　1; i < n;　++i) {
　　　　if (arr[0] < arr[i])
　　　　　　　　arr[0] = arr[i];
}

Comprehensive Collection of C Programming Examples