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C Basics

bookTwo Dimensional Arrays

Two-dimensional arrays are a bit like tables, think of them as arrays within arrays, with rows and columns. Declaring a two-dimensional array requires an extra set of square brackets:

int array[ROWS][COLUMNS];

Imagine a table where:

  • Row a[0]... represents the first set of data or the first array;
  • Row a[1]... is the second set;
  • Row a[2]... is the third.

When an array is placed inside another array, it's called a nested array. To access its elements, use multiple indices, each enclosed in its own set of brackets.

main.c

main.c

copy

              
123456789101112131415

            
#include <stdio.h> 

int main() {
	// dimensional array declaration
	int array[3][4] = { 
						{1, 11, 111, 1111}, // Index `[0]`
						{2, 22, 222, 2222}, // Index `[1]`
						{3, 33, 333, 3333} // Index `[2]`
	};

    // Print the first element of the second nested array
	printf("%d", array[1][0]); 

	return 0;
}
Note
Note

All elements within an array must be of the same type.

question mark

What is the output of this code?

Select the correct answer

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Grazie per i tuoi commenti!

Sezione 2. Capitolo 5

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bookTwo Dimensional Arrays

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Two-dimensional arrays are a bit like tables, think of them as arrays within arrays, with rows and columns. Declaring a two-dimensional array requires an extra set of square brackets:

int array[ROWS][COLUMNS];

Imagine a table where:

  • Row a[0]... represents the first set of data or the first array;
  • Row a[1]... is the second set;
  • Row a[2]... is the third.

When an array is placed inside another array, it's called a nested array. To access its elements, use multiple indices, each enclosed in its own set of brackets.

main.c

main.c

copy

              
123456789101112131415

            
#include <stdio.h> 

int main() {
	// dimensional array declaration
	int array[3][4] = { 
						{1, 11, 111, 1111}, // Index `[0]`
						{2, 22, 222, 2222}, // Index `[1]`
						{3, 33, 333, 3333} // Index `[2]`
	};

    // Print the first element of the second nested array
	printf("%d", array[1][0]); 

	return 0;
}
Note
Note

All elements within an array must be of the same type.

question mark

What is the output of this code?

Select the correct answer

Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 2. Capitolo 5
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