diff --git a/1-js/02-first-steps/10-ifelse/article.md b/1-js/02-first-steps/10-ifelse/article.md index 2fd4ca88..f01058aa 100644 --- a/1-js/02-first-steps/10-ifelse/article.md +++ b/1-js/02-first-steps/10-ifelse/article.md @@ -2,13 +2,13 @@ Sometimes we need to perform different actions based on a condition. -There is the `if` statement for that and also the conditional (ternary) operator for conditional evaluation which we will be referring as the “question mark” operator: `"?"` for simplicity. +There is the `if` statement for that and also the conditional (ternary) operator for conditional evaluation which we will be referring as the “question mark” operator `?` for simplicity. [cut] ## The "if" statement -The "if" statement gets a condition, evaluates it and, if the result is `true`, executes the code. +The `if` statement gets a condition, evaluates it and, if the result is `true`, executes the code. For example: @@ -22,7 +22,7 @@ if (year == 2015) alert( 'You are right!' ); In the example above, the condition is a simple equality check: `year == 2015`, but it can be much more complex. -If there is more than one command to execute, we can use a code block in figure brackets: +If there is more than one statement to be executed, we have to wrap our code block inside curly braces: ```js if (year == 2015) { @@ -31,7 +31,7 @@ if (year == 2015) { } ``` -It is recommended to use figure brackets every time with `if`, even if there is only one command. That improves readability. +It is recommended to wrap your code block with curly braces `{}` every time with `if`, even if there is only one statement. That improves readability. ## Boolean conversion @@ -128,7 +128,7 @@ alert(accessAllowed); The so-called "ternary" or "question mark" operator lets us do that shorter and simpler. -The operator is represented by a question mark `"?"`. The formal term "ternary" means that the operator has three operands. It is actually the one and only operator in JavaScript which has that many. +The operator is represented by a question mark `?`. The formal term "ternary" means that the operator has three operands. It is actually the one and only operator in JavaScript which has that many. The syntax is: ```js @@ -151,7 +151,7 @@ Technically, we can omit parentheses around `age > 18`. The question mark operat let accessAllowed = age > 18 ? true : false; ``` -...But parentheses make the code more readable. So it's recommended to use them. +But parentheses make the code more readable, so it's recommended to use them. ````smart In the example above it's possible to evade the question mark operator, because the comparison by itself returns `true/false`: @@ -164,7 +164,7 @@ let accessAllowed = age > 18; ## Multiple '?' -A sequence of question mark `"?"` operators allows returning a value that depends on more than one condition. +A sequence of question mark `?` operators allows returning a value that depends on more than one condition. For instance: ```js run @@ -201,7 +201,7 @@ if (age < 3) { ## Non-traditional use of '?' -Sometimes the question mark `'?'` is used as a replacement for `if`: +Sometimes the question mark `?` is used as a replacement for `if`: ```js run no-beautify let company = prompt('Which company created JavaScript?', ''); @@ -212,7 +212,7 @@ let company = prompt('Which company created JavaScript?', ''); */!* ``` -Depending on the condition `company == 'Netscape'`, either the first or the second part after `"?"` gets executed and shows the alert. +Depending on the condition `company == 'Netscape'`, either the first or the second part after `?` gets executed and shows the alert. We don't assign a result to a variable here. The idea is to execute different code depending on the condition. @@ -236,4 +236,4 @@ if (company == 'Netscape') { Our eyes scan the code vertically. The constructs which span several lines are easier to understand than a long horizontal instruction set. -The idea of a question mark `'?'` is to return one or another value depending on the condition. Please use it for exactly that. There is `if` to execute different branches of the code. +The idea of a question mark `?` is to return one or another value depending on the condition. Please use it for exactly that. There is `if` to execute different branches of the code.