A few new concepts are needed for this SKB.
First, what is aBoolean? ABooleancan only take two values:trueorfalse. It is the result of a mathematical question. For instance, is 2 less than 5 (2 < 5), it would returns "yes" (true).
And from previous SKB, you might have noticed thatasserttests if what is inside istrue.
In Scala, and in the majority of other programming languages, you have a series of built-in comparators for mathematics:
==: for equality. Some tips here:- Notice that there are two
==. With only one=, it would be an assignation (Like in:val a = 2). - In your projects as a software engineer, always be careful about comparing numbers with decimals (Like
1.5632426546, they are calledDoubleorFloat) because the computer will round those numbers. So instead ofa == b, you should be doing something like:Math.abs(a - b) < 0.01.
- Notice that there are two
!=: Not equal>: Greater than<: Less than>=: Greater than or equal<=: Less than or equal
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