How to resolve the algorithm Empty string step by step in the ALGOL 68 programming language

Published on 12 May 2024 09:40 PM
#Algol 68

How to resolve the algorithm Empty string step by step in the ALGOL 68 programming language

Table of Contents

Problem Statement

Languages may have features for dealing specifically with empty strings (those containing no characters).

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Empty string step by step in the ALGOL 68 programming language

Source code in the algol programming language

# declare a string variable and assign an empty string to it                  #
STRING s := "";

# test the string is empty                                                    #
IF s = "" THEN write( ( "s is empty", newline ) ) FI;

# test the string is not empty                                                #
IF s /= "" THEN write( ( "s is not empty", newline ) ) FI;

# as a string is an array of characters, we could also test for emptyness by  #
# checking for lower bound > upper bound                                      #
IF LWB s > UPB s THEN write( ( "s is still empty", newline ) ) FI

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