Use Text Joining for a Message
Join the stated text fragments in order, preserving any explicit spaces.
About 18 minutes, plus any extended practice
Supplied materials
- Paper and pencil; answers may also be spoken or typed.
- All cases, labels, numbers and rules are supplied on this page. No real account, private information or purchase is needed.
Learn the idea
A program can join text fragments to build a message. Spaces and punctuation must be included where required. Joining text is different from numeric addition: the text values 2 and 3 can form 23. The examples state which values are text, so the intended operation is unambiguous.
Join the stated text fragments in order, preserving any explicit spaces. Do not silently insert spaces or turn stated text into numbers.
Use this supplied case: Join text Hi and Fox with no space. Choose the joined text. Use the details in this example. Say which detail helped you choose. This pretend example does not tell us how every real system works.
- Follow the worked example one step at a time. Say or draw what happens.
- Join the stated text fragments in order, preserving any explicit spaces.
- Say which detail makes the example answer fit. Pick another answer and say why it does not fit.
- Try the question and practice questions. Read the rule again if your answer does not match the explanation.
See the method in action
Join text "Red" and "Boat" with no separator: the result is "RedBoat". Insert one explicit space fragment and it becomes "Red Boat". For a different typed example, joining text "7" and "8" gives "78", while adding numbers 7 and 8 gives 15. Trace the supplied fragments character by character. The operation cannot assume spaces or numeric conversion that the rule does not supply.
Check your reasoning
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Helpful tips
- Join the stated text fragments in order, preserving any explicit spaces.
- Do not silently insert spaces or turn stated text into numbers.
See the answer and explanation
Hi Fox
The supplied case states: Join text Hi, one space and Fox. Choose the joined text. Under the stated distinction, this identifies Hi Fox. A program can join text fragments to build a message. Spaces and punctuation must be included where required. Joining text is different from numeric addition: the text values 2 and 3 can form 23. The examples state which values are text, so the intended operation is unambiguous. Join the stated text fragments in order, preserving any explicit spaces.
Take it further
Join text Good, one space, and morning. Expected:"Good morning". Joining text 4 and 5 gives"45", while numeric addition gives 9.
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More practice: try new cases
Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.
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Check the subject sources
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