﻿ C : Check if a given array of integers contains 5s and 7s

# C Exercises: Check whether a given array of integers contains 5's and 7's

## C-programming basic algorithm: Exercise-55 with Solution

Write a C program to check whether a given array of integers contains 5's and 7's.

C Code:

``````#include <stdio.h>
#include <stdlib.h>

// Function prototype for 'test'
int test(int nums[], int arr_size);

int main(void){
// Declaration and initialization of variables
int arr_size;

// Declaration and initialization of an integer array 'array1'
int array1[] = {1, 5, 6, 9, 10, 17};

// Calculating the size of the array 'array1'
arr_size = sizeof(array1)/sizeof(array1);

// Printing the result of the 'test' function for 'array1'
printf("%d",test(array1, arr_size));

// Declaration and initialization of an integer array 'array2'
int array2[] = {1, 4, 4, 9, 10, 17};

// Calculating the size of the array 'array2'
arr_size = sizeof(array2)/sizeof(array2);

// Printing the result of the 'test' function for 'array2'
printf("\n%d",test(array2, arr_size));

// Declaration and initialization of an integer array 'array3'
int array3[] = {1, 5, 5, 9, 10, 17, 5, 5};

// Calculating the size of the array 'array3'
arr_size = sizeof(array3)/sizeof(array3);

// Printing the result of the 'test' function for 'array3'
printf("\n%d",test(array3, arr_size));
}

// Definition of the 'test' function
int test(int nums[], int arr_size)
{
// Looping through the elements of the array
for (int i = 0; i < arr_size; i++)
{
// Checking if the current element is either 5 or 7
if (nums[i] == 5 || nums[i] == 7)
{
return 1; // If condition met, return 1 (true)
}
}

return 0; // If condition not met for any element, return 0 (false)
}
``````

Sample Output:

```1
0
1
``` C Programming Code Editor:

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