C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast


What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


What is String C String Functions


What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer


What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C One Dimensional Array

What Is One Dimensional Array

An array which has only one subscript is known as one dimensional array i.e) int arr[10].

c one dimensional array

Syntax - One Dimensional Array

data_type varname[size];

Rules For Declaring One Dimensional Array

  • An array variable must be declared before being used in a program.
  • The declaration must have a data type(int, float, char, double, etc.), variable name, and subscript.
  • The subscript represents the size of the array. If the size is declared as 10, programmers can store 10 elements.
  • An array index always starts from 0. For example, if an array variable is declared as s[10], then it ranges from 0 to 9.
  • Each array element stored in a separate memory location.

Program - One Dimensional Array

In C programming, programmers can also initialize the array variable without mentioning the size of an array. The compiler will automatically deduct the size of an array.

int student[5] = {89, 76, 98, 91, 84};
int student[] = {89, 76, 98, 91, 84};
#include <stdio.h>
int main()
int s[5] = {89, 76, 98, 91, 84}, i;
printf("\n---Students marks details--- ");
for(i = 0; i < 5; i++)
printf("\ns%d = %d ", i + 1, s[i]);
return 0;
  • ---Students marks details---
  • s1 = 89
  • s2 = 76
  • s3 = 98
  • s4 = 91
  • s5 = 84


The above program illustrates that the declaration and initialization of one dimensional array. The first element of an array is s[0]. The last element of an array is a[4].

Report Us

We may make mistakes(spelling, program bug, typing mistake and etc.), So we have this container to collect mistakes. We highly respect your findings.


We to update you