{"id":11764,"date":"2023-01-17T06:39:15","date_gmt":"2023-01-17T06:39:15","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=11764"},"modified":"2023-04-24T11:12:58","modified_gmt":"2023-04-24T11:12:58","slug":"array-in-c","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/array-in-c\/","title":{"rendered":"Array in C"},"content":{"rendered":"

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You will learn how to work with arrays in this tutorial. With the aid of examples, you will discover how to declare, c initialize array, and access array elements.<\/p>\n

\"\"<\/p>\n

An array is a type of variable that can store several values. For example, if you wanted to store 100 integers, you could make an array for it.<\/p>\n

Definition of Array<\/h2>\n

The definition of an array in C is a way to group together several items of the same type. These elements may have user-defined data types like structures, as well as standard data types like int, float, char, and double. All of the components must, however, be of the same data type in order for them to be stored together in a single array. The items are kept in order from left to right, with the 0th index on the left and the (n-1)th index on the right. <\/p>\n

How may an array be declared?<\/h2>\n

Array Syntax is very easy to declared. You just need to understand the statement given below.<\/p>\n

Declaration of array syntax:<\/strong><\/p>\n

dataType array_name[arraySize];<\/code><\/pre>\n
Example<\/strong>:- Declare an array<\/p>\n
int student_marks[20];\nchar student_name[10];\nfloat numbers[5];<\/code><\/pre>\n
In the last example, we declared an array \u201cnumbers\u201d of the type int. Its length is 5. In other words, it can store 5 integer numbers.<\/p>\n
It’s crucial to remember that once an array is declared, its size and type cannot be modified.<\/p>\n
Access Array Elements<\/h2>\n
An array’s items can be accessed using their indices.
\nLet’s say you made the above array declaration. mark[0] is the initial element, followed by mark[1] and so on.<\/p>\n
\"\"<\/p>\n
Few keynotes:<\/strong><\/p>\n
    \n
  • Arrays have 0 as the first index, not 1. In this example, mark[0] is the first element.<\/li>\n
  • If the size of an array is n, to access the last element, the n-1 index is used. In this example, mark[4]<\/li>\n
  • Suppose the starting address of mark[0] is 2120d. Then, the address of the mark[1] will be 2124d. Similarly, the address of mark[2] will be 2128d and so on.<\/li>\n
  • This is because the size of an int address is 4 bytes.<\/li>\n<\/ul>\n
    Discover The C Initialize Array<\/h2>\n
    An array can be initialized while being declared. For instance,<\/p>\n
    int mark[5] = {19, 10, 8, 17, 9};<\/code><\/pre>\n
    C initialize array can be done using this formula:<\/p>\n
    int mark[] = {19, 10, 8, 17, 9};<\/code><\/pre>\n
    Here, the size is left unspecified. However, because we initialize it with 5 elements, the compiler is aware that it has a size of 5.<\/p>\n
    \"\"<\/p>\n
    Here,<\/p>\n
    mark[0] is equal to 19\nmark[1] is equal to 10\nmark[2] is equal to 8\nmark[3] is equal to 17\nmark[4] is equal to 9<\/code><\/pre>\n
    Change Value of Array elements<\/h2>\n
    Array is very flexible for changing the value of its elements. You can simply change any element as show in the example below:<\/p>\n
    int mark[5] = {19, 10, 8, 17, 9}\n\n\/\/ make the value of the third element to -1\nmark[2] = -1;\n\n\/\/ make the value of the fifth element to 0\nmark[4] = 0;<\/code><\/pre>\n
    Input and Output Array Elements<\/h2>\n
    Here’s how to take user input and store that value in an array element.<\/strong><\/p>\n
    \/\/ take input and store it in the 3rd element\nscanf(\"%d\", &mark[2]);\n\n\/\/ take input and store it in the ith element\nscanf(\"%d\", &mark[i-1]);<\/code><\/pre>\n
    How to print an individual array element is shown below.<\/strong><\/p>\n
    \/\/ print the first element of the array\nprintf(\"%d\", mark[0]);\n\n\/\/ print the third element of the array\nprintf(\"%d\", mark[2]);\n\n\/\/ print ith element of the array\nprintf(\"%d\", mark[i-1]);<\/code><\/pre>\n
    Code Implementation of Taking Array Input\/Output<\/strong>
    \n\t\t\t\t\t\t