Arrays with Loops
Learn to use arrays with the help of loops in JavaScript.
The for
loop with arrays
The individual values in an array are accessed through an index number. The for
loop variable can be used as an index number. However, the list values can also be used directly in the for
loop.
The following program demonstrates the various ways of accessing array elements:
In the code above:
-
The new item is the
length
function, which is used to get the length of the array. -
The first
for
loop accesses the array values with the help of the loop variable,i
. -
The second
for
loop directly accesses the array values. -
The third
for
loop accesses the list values with the help of the loop variablev
and thelength
function.
The while
loop with arrays
We usually use the while
loop to deal with an array when the number of iterations is not fixed. For example, let’s say we want to generate n
terms of a Fibonacci sequence and store them in a list, where n
is the user input. A Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones, except for the first two terms.
Let’s start by noting a few terms from this sequence: ...