C Arrays

programming C MOC

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Arrays are created by a [] after the variable name and with {}. All items in the array must be the stated type. The array is restricted to the size when created.

Arrays can specifically define the size in the [] or automatically.

Items in the array can be retrieved and changed using their index, but not appended, since the array is restricted in size..

#include <stdio.h>
 
int main() {
	int nums[5] = {2, 4, 6, 8, 10};
	printf("Array item at index 3: %d\n", nums[3]);
	// Array item at index 3: 8
	nums[3] = 1337;
	printf("Array item at index 3: %d\n", nums[3]);
	// Array item at index 3: 1337
 
	return 0;
}

Multidimensional Arrays

Arrays can include arrays.

#include<stdio.h>
 
int main() {
   int grid[3][2] = {{17, 50}, {34, 12}, {25, 19}};
   printf("Row 2, Col 1: %d", grid[1][0]);
 
   return 0;
}