JavaScript Language
Hello people! This week we will be talking about the different punctuation marks used in JavaScript and the different purposes they serve.
( ) - Parentheses:
- Hold paramater names when defining a function and hold arguement values when calling a function. E.g. Defining the function:
area(height, width)and calling the function:area(5, 4). Note: If parameters are not required, empty parenthesis must still be used when defining and calling a function. - Surround conditional statements in some functions. E.g.
if(it rains tomorrow)wear a coat. - Determine the order of operations in mathematical equations. E.g.
Y = 7 + (5 x 4)
[ ] - Brackets:
- Hold values in an array (each one separated by a comma) and hold the index number when accessing an array. E.g.
shopping [shirt, tie, shoes]andshopping[1] = tie
{ } - Braces:
- Holds KEY:VALUE pairs when defining an object (each pair separated by a comma). E.g.
Shopping {shirt: blue, tie: orange}- "Yeow! What a funky lookin' outfit!" - Hold blocks of code within functions (each statement separated by a semicolon). E.g.
make tea {boil water; get cup}
'Single quotes' and "Double quotes":
- Used to surround strings of English language text to let the browser know it is not code. Both do exactly the same job, so it is down to personal preference which you choose to use as a developer.
- The only rule is that the opening and closing quotations MUST be the same. This means you can use the opposite pair within your string and they will appear in the actual text on the page. E.g.
"Press the 'submit' button!"= Press the 'submit' button!
Ciao for now,
