Array indices are zero-based because the first element is at offset zero from the start of the array. There is no such thing as a one-based array in C. Some other languages do allow you to specify the base of an array, but converting a non-zero-based index to a zero-based index adds a runtime overhead to the implementation.
In order to provide modulo (%) facilities as far as mathematics and logic is concern. for instance , if we have no of employees in our list say 1545 and if we want to accommodate it within small and effective range then by using % we can do it easily.... we can arrange it in the range within Array with maximum index 14 (0,1,2,.....14). And 0,15,30,45......1545 will belongs to same category say index no 0. Think if 0 is not included into index then where we would store 0,15,30,45....1530,1545 . From a technical standpoint, you need to understand that an array is basically just the starting address of a chunk of memory. The "index" of the array is actually an address offset. So the value at the 0th position would be stored at the address of the array plus zero. The value at the 1st position would be stored at the address plus one, and so on.
0
Full representation of an array begins from the index 0 and ends at n-1 where n is the number of variables of the array.
Since an array cannot contain a negative number of items, the size of an array must be at least 0. So if you ever tried to retrieve the element at a negative index in an array, it would automatically be understood to be out-of-bounds.
In order to provide flexibility in modular operation.
C++ array indices are zero-based because the first element in any array is offset 0 elements from the start address. The second element is offset by 1 element and the third by 2 elements, and so on. To put it another way, the index refers to the number of elements that come before the desired element. The first element has zero elements before it, so it is index 0. For an array of n elements, the last element is at index n-1.
A key is the name of a variable in an array ($array["key"]) and the index is the position it's at ($array = ["key" => 0], the index would be 0). Keys and indices are the same if the array is not associative though ($array = [true], the key holding the value true is named 0 and is at index 0).
By design; it makes the compiler's work easier. 1-based array's addressing-function: Address (array, index) = Address (array) + (index-1)*Elemsize(array) 0-based array's addressing-function: Address (array, index) = Address (array) + index*Elemsize (array)
Array indices are zero-based because the first element is at offset zero from the start of the array. There is no such thing as a one-based array in C. Some other languages do allow you to specify the base of an array, but converting a non-zero-based index to a zero-based index adds a runtime overhead to the implementation.
In order to provide modulo (%) facilities as far as mathematics and logic is concern. for instance , if we have no of employees in our list say 1545 and if we want to accommodate it within small and effective range then by using % we can do it easily.... we can arrange it in the range within Array with maximum index 14 (0,1,2,.....14). And 0,15,30,45......1545 will belongs to same category say index no 0. Think if 0 is not included into index then where we would store 0,15,30,45....1530,1545 . From a technical standpoint, you need to understand that an array is basically just the starting address of a chunk of memory. The "index" of the array is actually an address offset. So the value at the 0th position would be stored at the address of the array plus zero. The value at the 1st position would be stored at the address plus one, and so on.
You cannot do this easily in C programming. Arrays in C always start with index 0. If you must use a negative array index, you can do that by allocating an array, and then pointing to an element within the array. Say you allocate an array 10 ints long, named a; then set b = &a[5]. Then b[-4] = a[1]. However, this is extremely bad programming practice and is almost certain to cause data corruption. Some compilers will treat array indices as unsigned, also, so that when you specify b[-4], the compiler will internally simplify that to b[65532] and your program will crash.
0
#include<stdio.h> #include<conio.h> main() { int a[100]; int n,largest,index,position; printf("enter the number of elements in the array"); scanf("%d",&n); printf("enter %d elements",n); for(index=0;index<n;index++) scanf("%d",&a[index]); largest=a[0]; position=0; for(index=1;index<n;index++) if(a[index]>largest) { largest=a[index]; position=index; } printf("largest element in the array is %d\n",largest); printf("largets element's position in the array is %d\n",position+1); getch(); }
Full representation of an array begins from the index 0 and ends at n-1 where n is the number of variables of the array.
Traverse the array from index 0 until you find the number. Return the index of that number.
Since an array cannot contain a negative number of items, the size of an array must be at least 0. So if you ever tried to retrieve the element at a negative index in an array, it would automatically be understood to be out-of-bounds.