The Program in C to insert an integer at the beginning of an array is given below:

#include <stdio.h>

int main() {
    int n, new_element;
    printf("Enter the number of elements in the array: ");
    scanf("%d", &n);
    int a[n+1];
    printf("Enter the elements of the array: ");
    for (int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
    }
    printf("Enter the new element to be inserted: ");
    scanf("%d", &new_element);
    for (int i = n; i > 0; i--) {
        a[i] = a[i-1];
    }
    a[0] = new_element;
    printf("The updated array is: ");
    for (int i = 0; i <= n; i++) {
        printf("%d ", a[i]);
    }
    return 0;
}

Output:

Enter the number of elements in the array: 4
Enter the elements of the array: 12
33
6
9
Enter the new element to be inserted: 4
The updated array is: 4 12 33 6 9

Pro-Tips💡

• The above code is a C program that takes an array of integers as input, and inserts a new element at the beginning of the array.
• The program first prompts the user to enter the number of elements in the array, and then declares an array of size n+1.
• Then it uses a for loop to read the elements of the array and store them in the array. After that, it prompts the user to enter the new element that they want to insert at the beginning of the array.
• It then uses a for loop to shift all the elements of the array one position to the right, starting from the last element.
• After that, it assigns the new element to the first position of the array. Finally, it uses another for loop to print the updated array.
• The code uses the scanf function to read the inputs of the number of elements in the array and the elements of the array.
• It uses the printf function to display the output of the array after inserting the new element.
• This program can be useful for inserting elements in the array at the beginning of the array as it uses a loop to shift all the elements one position to the right and assign the new element to the first position of the array.