C Array to Function

Syntax

void functionName(data_type arrayName[], int arraySize){
    // function code here
}

Example

#include <stdio.h>

void printArray(int arr[], int size){
   int i;
   for (i = 0; i < size; i++){
      printf("%d ", arr[i]);
   }
}

int main(){
   int myArray[5] = {10, 20, 30, 40, 50};

   // calling function to print array elements
   printArray(myArray, 5);

   return 0;
}

Output

10 20 30 40 50

Explanation

C Array to Function is a way to pass an array as an argument to a function in C programming language. This is useful when we want to perform operations on an array within a function or when we want to use the same array in multiple functions.

In the above example, we have declared a function printArray, which takes an array arr and its size as arguments. The function then performs a for-loop on the input array printing each value to the console.

The main function contains an array myArray that is passed as an argument to printArray function.

Use

Using C Array to Function method is widely used in various use cases such as sorting, searching, mathematical calculations, or simply for code organization purposes. It is a powerful way to handle data manipulation operations within your code block.

Important Points

• Arrays are passed by reference to functions, which means that any changes done to the array inside the function will affect the original array.
• The size of the array to be passed to the function must be explicitly passed as an argument.
• Array arguments passed to the function automatically decay to pointers, so their sizes cannot be determined within the function definition.
• Functions can return arrays in C language as well.

Summary

C Array to Function is an essential programming concept in the C programming language. Using this method, users can perform various operations on arrays within or across functions. It is recommended for developers to have a good understanding of this feature to design robust programs.