01. Control flow
Control flow allows you to direct the flow of code depending on the conditions which are given. Here are the main operators used in comparison evaluations.
Comparison operators
- <
- Less than.
- >
- Greater than.
- >=
- Greater than or equal to.
- <=
- Less than or equal to.
4 > 10 // false
'hi' > 'hello' // true, checks if greater alphabetically
4 >= 3 // trueConditionals
- ==
- Equal to - doesn't have to be the same type.
- ===
- Strict equal to - must be the same type.
- !=
- Not equal to.
The difference between the first two conditionals can be show by a simple example:
3 == '3' // true
3 === '3' // false, must be of same type
3 != 3 // falseLogical operators
The logical operators AND or OR allow you to group two evaluations together. An AND evaluates to true only if both sides of the expression are true, while an OR evaluates to true if either side is true.
To get the opposite of an evaluation, use the exclamation mark (!). This will turn a false into true and vice versa.
- &&
- AND operator
- ||
- OR operators
- !
- NOT operator
!true; // false
! (3 > 3) // true
4 < 3 && 2 < 5; // true
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