To pass this unit, please study the 16 vocabulary words below.
- & (ampersand)
- * (asterisk)
- @ (at sign)
- \ (back slash)
- { } (brackets)
- case
- / (forward slash)
- > (greater than sign)
- < (less than sign)
- - (minus sign)
- ( ) (parentheses)
- % (percent sign)
- + (plus sign)
- [ ] (square brackets)
- ~ (tilde)
- _ (underscore)
USA
UK
USA
UK
a symbol which is normally used to mean "and"
USA
UK
"In SQL queries it is best practice to spell out 'AND' and not just use the ampersand (&) as a shortcut."
USA
UK
USA
UK
the character which often means "multiply" in a math equation or "match all" in a regular expression wildcard
USA
UK
"The programmer could not remember whether to use an asterisk (*) or a percent sign (%) as a wildcard in his SQL regular expression."
USA
UK
USA
UK
the symbol often used in email addresses to separate usernames from domain names
USA
UK
"The at sign key is often in very different locations on many international keyboards."
USA
UK
USA
UK
a character used to separate files and folders in Windows, and as an escape character in certain programming tasks
USA
UK
"The user files were located in 'C:\documents and settings\gregbrady\my documents'."
USA
UK
USA
UK
punctuation marks often used as control structures, or to denote variable interpolation
USA
UK
"Brackets are also called "curly braces" and are used to define the beginning and end of code blocks, such as in functions or loops."
USA
UK
USA
UK
in typography this is the distinction between capital (big) and minuscule (small) letters
USA
UK
"In order to change case on a computer, the user typically presses the "Shift" key."
USA
UK
USA
UK
a key used to separate folders and files, often used in Unix file systems
USA
UK
"The user's php binary was located in /usr/local/php."
USA
UK
USA
UK
the sign which means that the value on the right is less than the value on the left
USA
UK
"5 > 3"
USA
UK
USA
UK
the sign which means that the value on the left is smaller than the value on the right
USA
UK
"3 < 5"
USA
UK
USA
UK
the operator symbol often indicating the process of subtraction or difference
USA
UK
"The program did not output the expected result because the programmer forgot a minus sign."
USA
UK
USA
UK
symbols used in pairs to group values or sets of values
USA
UK
"Parentheses are often used to group values in an equation."
USA
UK
USA
UK
the symbol meant to show a common measurement based on a fraction of 100
USA
UK
"The CEO reported that sales were up 75% over last quarter."
USA
UK
USA
UK
the operator symbol, normally indicating addition
USA
UK
"The elementary school teacher told the students that 2 + 2 = 4."
USA
UK
USA
UK
symbols used in pairs to set apart or interject text within other text
USA
UK
"In programming languages, the use of square brackets are sometimes used to show the elements of an array."
USA
UK
USA
UK
this key normally means "approximately" in mathematics; in Unix systems this character is used to represent a home directory
USA
UK
"The student learned that his home directory was 'home/~johndoe' and his web directory was 'http://www.university.co.uk/students/johndoe'."
USA
UK
USA
UK
a character often used in file names to join words without using a space; originally used on typewriters to make underlined text
USA
UK
"The long file name "hippy_dippy_string_concatenation.pl" contained many underscores because spaces aren't advised in Unix file names."