5 Steps to a 5 by Julie Schacht Sway

Author:Julie Schacht Sway
Language: eng
Format: epub
Publisher: McGraw Hill LLC
Published: 2023-09-15T00:00:00+00:00

Example—using our list of numbers:

numbers ← [1, 3, 5, 14, 15, 29]

The command:

REMOVE (numbers, 2)

Changes our list to be:

numbers ← [1, 5, 14, 15, 29]

• Length. The length of a list is the number of elements in the list.

Example—using our list of numbers:

numbers ← [1, 5, 14, 15, 29]

The command:

LENGTH (numbers)

Returns the value 5 because there are five elements currently in the list.

This number can be useful in processing items in a list. You can use references such as:

snacks[LENGTH(snacks)]

to access the last item in the list without having to know the length in advance. First, the value LENGTH(snacks) is evaluated and returns the number 5 for our current list. Our statement now looks like: snacks[5], which is the value “nuts”.

With thousands or millions of elements in a list, we can’t count them all. Even with a few dozen, people would occasionally make mistakes, and it would take so much longer than the split millisecond a computer would take. Write the code and let a computer do it!

There are many other built-in methods, and you should become comfortable with looking these up along with their format for programming languages you use in the programming language documentation.

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