How do I find the last index of an array?

Subtracting 1 from the length of an array gives the index of the last element of an array using which the last element can be accessed. The reason we are subtracting 1 from the length is, in JavaScript, the array index numbering starts with 0. i.e. 1st element’s index would 0.

What is the index value of last element of a string?

zero
Description. Strings are zero-indexed: The index of a string’s first character is 0 , and the index of a string’s last character is the length of the string minus 1.

Is last an index?

The lastIndexOf() method returns the last index (position) of a specified value. The lastIndexOf() method returns -1 if the value is not found. The lastIndexOf() starts at a specified index and searches from right to left.

How do you find the last index of a character in a string in Java?

Java String lastIndexOf() Method The lastIndexOf() method returns the position of the last occurrence of specified character(s) in a string. Tip: Use the indexOf method to return the position of the first occurrence of specified character(s) in a string.

What is the index of the last element in an array with 9 elements?

size =9; array-index of last element is =9-1=8.

What is the index of the last element in an array with 29 elements?

question. The index number of the last element of an array with 29 elements is 28.

How do I get the last index of an array in Python?

There are 2 index in Python that point to last element in list.

1. list[ len – 1 ] : Points to last element by definition.
2. list[-1] : In python, negative indexing starts from end.

What is the last index of a string Java?

Definition and Usage The lastIndexOf() method returns the position of the last occurrence of specified character(s) in a string. Tip: Use the indexOf method to return the position of the first occurrence of specified character(s) in a string.

Can you use indexOf for an array?

Introduction to the JavaScript array indexOf() method 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 would you access the 2nd to last element in an array Java?

To get the second to last element in an array, call the at() method on the array, passing it -2 as a parameter, e.g. arr.at(-2) . The at method returns the array element at the specified index. When passed a negative index, the at() method counts back from the last item in the array.