# 2d array in c

In this tutorial, you will learn to work with arrays. An m × n (read as m by n) order matrix is a set of numbers arranged in m rows and n columns. Similarly, the array of Strings is nothing but a two-dimensional (2D) array of characters. In C programming, you can create an array of arrays. For example, if you want to store 100 integers, you can create an array for it. C program to swap two arrays using pointer. In C language, the compiler calculates offset to access the element of the array. The reasons for this are twofold: the main problem is that arrays are not pointers and the second inconvenience is the so called pointer decay. This post is an extension of How to dynamically allocate a 2D array in C? The array can hold 12 elements. In C/C++, when you pass an array to a function, it decays to be a pointer pointing to first element of the array.So, in pixels() function, you are returning the address of a stack allocated variable. You can think the array as a table with 3 rows and each row has 4 columns. C program to search an element in array using pointers. In this topic, we are going to learn about 2D Arrays in C++. Feel free to checkout that tutorial. We already know that arrays are a collection of the same type of data that have a fixed size(in C programming language as in other languages we can increase the size of an array at runtime). C program to reverse an array using pointers. One important thing for passing multidimensional arrays is, first array dimension does not have to be specified. You can consider the 2D array to be an array of a 1D array so as to comprehend it easily. To store the entire list we use a 2d array of strings in C language. A one dimensional array can be easily passed as a pointer, but syntax for passing a 2D array to a function can be difficult to remember. Arrays can also be classified based on their dimensions, like:. Let’s take an example, Suppose int aiData is a 2D array that has 3 rows and 3 columns. You can pass multi-dimensional arrays to functions just like a 1-D array, but you need to specify the size of the all other dimensions except the first one. However, to work with multi-level data, we have to use the Multi-Dimensional Array. The Two Dimensional Array in C language is nothing but an Array of Arrays. Two-dimensional Arrays : : The simplest form of multidimensional array is the two-dimensional array. In this tutorial we will learn to work with two dimensional arrays using pointers in C programming language. In the previous tutorial Pointers and One Dimensional Array we learned to work with one dimensional character array. For e.g: If you need to pass arr to a function called func_1(), then you need to declare the func_1() like this: 1 2 3 4. The array of characters is called a string. 1-D arrays or one-dimensional array; 2-D arrays or two-dimensional arrays; and so on… In this tutorial, we will learn more about the 2D array. For example, float x; Here, x is a two-dimensional (2d) array. 2D Array is considered to be one of the simplest form under the multidimensional array. C program to sort array using pointers. If the data is linear, we can use the One Dimensional Array. You will learn to declare, initialize and access elements of an array with the help of examples. The calculation of the offset depends on the array dimensions. C Arrays. Access a 2d array using a single pointer. A two-dimensional array is, in essence, a list of one-dimensional arrays. “Hi”, “Hello”, and e.t.c are the examples of String. These arrays are known as multidimensional arrays. The returning variable's address is no longer valid because on pixels() return, the stack allocated variable goes out of scope. 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