Lesson 2 of 5 · 8 minutes
Text and numbers are different
The kind of a value is called its type.
A number can be used for maths, like 5. A
string is text inside quotes, like "5". They
look similar but act differently.
With numbers, + adds: 5 + 5 gives 10.
With strings, it joins: "5" + "5" gives "55".
Quotes tell the computer “this is text.”
They look alike. They do not act alike.
Predict first: what will each line print?
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Quick check
You can now tell text from numbers — and you know why + does not always mean add.