Complete SAS Programming Guide - Learn SAS and Become a Data Ninja - LENGTH, LENGTHN, LENGTHC Functions (Are You Working

The video tutorial begins with motivational words and an overview of the lesson. It explains the use of the length statement in coding, particularly for setting the length of character variables. The tutorial then delves into the length, lengthN, and lengthC functions, explaining their differences and how they handle strings with trailing blanks and missing values. Practical examples are provided to confirm the outputs of these functions, highlighting their usefulness in coding.

What is the main purpose of the length statement in programming?

• To set the length of integer variables

• To dictate the length of character variables

• To determine the size of arrays

• To calculate the length of strings

What symbol is used to indicate a character variable in the length statement?

• Ampersand (&)

• Asterisk (*)

• Dollar sign ($)

• Hash (#)

How does the length function handle trailing blanks in a string?

• It returns an error

• It ignores them

• It counts them as half a character

• It includes them in the count

What does the lengthN function return when there is a missing character value?

• One

• Zero

• Null

• Negative one

Which function includes trailing blanks in its count?

• Length

• LengthN

• None of the above

• LengthC

What is the output of the lengthC function for a string with three trailing blanks?

• The length of the string minus three

• The length of the string plus three

• The length of the string

• Zero

Why are length functions considered useful in programming?

• They allow for manual counting of characters

• They automate the counting process

• They are only used for debugging

• They are rarely used in practice