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]= { 1, 2, 3, 4, 5, 6 };
void main() {
clrscr();
int len=sizeof(array)/sizeof(int);
printf("Length Of Array=%d", len);
getch();
}
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Output will be displayed as:
ARRAYLEN.EXE
Download Source Code:
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