C Array length example

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C Array length example

An array is a contiguous group of data items with the same name and data type. In order to get the length of an array, we have used the sizeof operator.

An array is a contiguous group of data items with the same name and data type. In order to get the length of an array, we have used the sizeof operator.

C Array length example

     

In this section you will learn how to determine the length of an array in C.

An array is a contiguous group of data items with the same name and data type. In order to get the length of an array, we have used the sizeof operator. The sizeof operator gives the amount of storage, in bytes, required to store an object. This operator avoids machine-dependent data sizes in the programs.

#include
-
Coded statements that contain (#)sharp sign are are the directives of the preprocessor. In our example #include<stdio.h> is an indication for preprocessor of the compiler and it means to include the stdio.h header file. 

<stdio.h>- This is the header file due to which standard input/output functions are included to be performed into the program. It is necessary to include this header file as it is having some inbuilt functions like printf(), scanf() etc. The angle brackets are used to indicate system include files.

<conio.h>
- Its a non standard header file that contains clrscr(), getch() functions.

void main() - main is the function, inside which the compiler looks for the data to compile first. Though this method has default return int but the return type can be set to void that means now method return type is void and it will return no value.

clrscr()- It is used to clear the console  screen.

sizeof(array)/sizeof(int)
- These are the operators that determines the length of the array passed inside the operator parentheses..

getch()- This function reads each character. It holds the console screen and program output on it. Without this output on the screen will generate in flash and vanishes.

Here is the code:

ARRAYLEN.C

#include <stdio.h>
#include <conio.h>
int array[6]12345};
void main() {
  clrscr();
  int len=sizeof(array)/sizeof(int);
  printf("Length Of Array=%d", len);
  getch();
}

Output will be displayed as:

ARRAYLEN.EXE

Download Source Code:

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