↪️ Conditionals
Conditionals take an expression, which is code that evaluates to determine a value, and checks if it is 👍 or 👎. If it’s 👍, we can tell our program to do one thing — we can even account for 👎 to do another.
As we write more complex programs, conditionals allow us to address multiple scenarios and make our programs more robust.
If Statement
The ↪️ statement is very important. It allows for conditional execution of a code block. The whole syntax is:
- If the condition evaluates to
👍, the code block will be executed. - And if it evaluates to
👎, it’ll be ignored.
This example will display “a is greater than b” if the content for variable a is greater than b:
↪️ a ▶️ b 🍇😀 🔤a is greater than b🔤❗️🍉
Else Statement
The 🙅 extends an ↪️ statement to execute an additional code block in case the expression in the if statement evaluates to false.
For example, the following code would display “a is greater than b” if a is greater than b, and a is not greater than b otherwise:
↪️ a ▶️ b 🍇😀 🔤a is greater than b🔤❗️🍉🙅 🍇😀 🔤a is not greater than b🔤❗️🍉
Note: The 🙅 statements is only executed if the ↪️ statement evaluated to 👎, and if all 🙅↪️ statements evaluated to 👎 too.
