diff --git a/1-js/02-first-steps/10-ifelse/article.md b/1-js/02-first-steps/10-ifelse/article.md index a971c9da..de65cdfb 100644 --- a/1-js/02-first-steps/10-ifelse/article.md +++ b/1-js/02-first-steps/10-ifelse/article.md @@ -1,14 +1,14 @@ # Conditional operators: if, '?' -Sometimes we need to perform different actions basing on a condition. +Sometimes we need to perform different actions based on a condition. -There's an `if` operator for that and also the "question mark" operator: `"?"` for conditional evaluation. +There is `if` statement for that and also the conditional (ternary) operator for conditional evaluation which we will be referring as “question mark” operator: `"?"` for simplicity. [cut] -## The "if" operator +## The "if" statement -The "if" operator 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's more than one command to execute -- we can use a code block in figure brackets: +If there is more than one command to execute -- we can use a code block in figure brackets: ```js if (year == 2015) { @@ -31,11 +31,11 @@ if (year == 2015) { } ``` -It is recommended to use figure brackets every time with `if`, even if there's only one command. That improves readability. +It is recommended to use figure brackets every time with `if`, even if there is only one command. That improves readability. ## Boolean conversion -The `if (…)` operator evaluates the expression in parentheses and converts it to the boolean type. +The `if (…)` statement evaluates the expression in parentheses and converts it to the boolean type. Let's recall the conversion rules from the chapter : @@ -70,7 +70,7 @@ if (cond) { ## The "else" clause -The `if` operator may contain an optional "else" block. It executes when the condition is wrong. +The `if` statement may contain an optional "else" block. It executes when the condition is wrong. For example: ```js run @@ -85,7 +85,7 @@ if (year == 2015) { ## Several conditions: "else if" -Sometimes we'd like to test several variants of a condition. There's an `else if` clause for that. +Sometimes we'd like to test several variants of a condition. There is an `else if` clause for that. For example: @@ -220,7 +220,7 @@ We don't assign a result to a variable here, the idea is to execute different co The notation seem to be shorter than `if`, that appeals to some programmers. But it is less readable. -Here's the same with `if` for comparison: +Here is the same with `if` for comparison: ```js run no-beautify let company = prompt('Which company created JavaScript?', ''); @@ -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's `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.