![]() ![]() We can now write a program that "branches" at a particular point, running one of two possible sections of code. The else also has its own set of opening and closing curly braces to encapsulate lines of codeĬonsidering our flow chart from before, until now we haven't had a way to make the program do something different if the condition was false.The else must come immediately after the closing curly brace of an if statement.Some important notes about the else clause: In JavaScript we have the following conditional. The if/else statement is a part of JavaScript's 'Conditional' Statements, which are used to perform different actions based on different conditions. If the condition is false, another block of code can be executed. Inside the curly braces for the else clause you put lines of code that you want to run if the Boolean condition from the if statement is false. The if/else statement executes a block of code if a specified condition is true. You saw in the video how to add an else clause to an if-statement - hit the little + symbol on the tail of the if statement. ![]() With an if-else statement you are giving an either-or command:Įither the lines of code inside the if will execute or the lines inside the else will execute. The last solution to awkward if/else statements (especially those nested) is the no-else return statement and guard clause.If-Else Statements How If-Else Statements work undefined) // = NaN Copy the codeįor many, the instinctive solution to this problem is to add an if/else statement: let sumFunctionWithIf = ( a, b, inconsistentParameter) = ) // undefinedįunctionWithChaining() // undefined Copy the code 5, no-else return and Warning clause ![]() It feels like this when you're using inconsistent apis in general, and the code breaks because some value is undefined, right? let sumFunctionThatMayBreak = ( a, b, inconsistentParameter) = a+b+inconsistentParameter Discuss default arguments, or (| |) operator, open to merge, no optional chain - else - returns, and protection clause. In this article, I'll show you five ways to clean up code with unnecessary if-else statements. This is the 11th day of my participation in the genwen Challenge ![]()
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