How do you print the first and last elements of an array?

Operator[] requires an index and it returns reference to that index, thus, to get the first element of an array, we use 0 as an index (as we know that array index starts with 0) and to get the last element, we use array::size() function it returns the total number of elements, thus, to get the last element of an array.

How do you print the last element of an array?

The steps involved to get the last element of an array are:

1. Use array slice() to return a specific element.
2. Retrieve the last element using negative index array. slice(-1)
3. Save the last element in a variable.

How do you index the first and last item in a given array?

Accessing array elements The first element of an array is at index 0 , and the last element is at the index value equal to the value of the array’s length property minus 1 . Using an invalid index number returns undefined .

How do I print the first element of an array?

Alternativly, you can also use the reset() function to get the first element. The reset() function set the internal pointer of an array to its first element and returns the value of the first array element, or FALSE if the array is empty.

How do I print the first element and the last element then the second and second last element of an array in C?

Run a loop from beginning and ending of the array till you meet in the middle. This will print start_index first then end_index element. Then it will increase the start index and decrease the end index . Again it will print second element and second last element and so on.

How do we I access the first element in an array and II access the last element in an array?

The first and last elements are accessed using an index and the first value is accessed using index 0 and the last element can be accessed through length property which has one more value than the highest array index. The array length property in JavaScript is used to set or return the number of elements in an array.

How do I find the first element of a list?

The get() method of the ArrayList class accepts an integer representing the index value and, returns the element of the current ArrayList object at the specified index. Therefore, if you pass 0 to this method you can get the first element of the current ArrayList and, if you pass list.

How do you print the last element of an array in Python?

Use the indexing syntax array[length – 1] to get the last element in array .

1. an_array = np. array([1, 2, 3])
2. array_length = len(an_array)
3. last_element = an_array[array_length – 1]
4. print(last_element)

How do you initiate an array in JavaScript?

You can initialize an array with Array constructor syntax using new keyword. The Array constructor has following three forms. Syntax: var arrayName = new Array(); var arrayName = new Array(Number length); var arrayName = new Array(element1, element2, element3,…

How do you display the first element of an array in Linux?

To get the first element (10) from the array, we can use the subscript [ ] syntax by passing an index 0 . In bash arrays are zero-indexed, so the first element index is 0 .

How do I return the first index of an array?

To find the position of an element in an array, you use the indexOf() method. This method returns the index of the first occurrence the element that you want to find, or -1 if the element is not found. The following illustrates the syntax of the indexOf() method.

How do you reverse an array in place in C?

Logic to find reverse of array

1. Input size and elements in an array.
2. Declare another array that will store reversed array elements of original array with same size, say reverse[size] .
3. Initialize two variables that will keep track of original and reverse array.
4. Run loop from size – 1 to 0 in decremented style.

How to print the last element of an array in JavaScript?

So if we want to print the last element of an array, it will always present at length of an array minus 1. Here, in our case, the length of the array is 5 so the last element is present at (5-1=4) 4th position.

How to print start_index and end_index first and last in an array?

Let start_index = 0. Index of the last element of the array will be last_index. end_index = size of the array – 1. Now you know the first index and last index . Run a loop from beginning and ending of the array till you meet in the middle. This will print start_index first then end_index element.

How to find first and last elements in an array?

In C++, we can use sizeof operator to find number of elements in an array. We should not sizeof when arrays are passed as parameter s, there we must pass size and use that size to find first and last elements. In case of vectors in C++, there are functions like front and back to find first and last elements.

How to print the number of elements in an array?

// If you want print the last element in the array. int lastNumerOfArray= myIntegerNumbers ; Log.i (“MyTag”, lastNumerOfArray + “”); // If you want to print the number of element in the array. Log.i (“MyTag”, “The number of elements inside” + “the array ” +myIntegerNumbers.length);