String
Programming basics[1]
In computer programming, a string is traditionally a sequence of characters, either as a literal constant or as some kind of variable.[2].
Because strings are a sequence of characters, we can select them in the same way we can select elements from an array. For example:
myString = 'Hello World'
print(mystring[2])
# this program would output the letter l (L) .
Example[edit]
Here we encounter some different syntax rules. Programming languages define strings differently. Please do pay attention to the quotation marks, double quotation marks, and triple quotation marks.
PHP[edit]
Please click the following link to read the official PHP page regarding single quotes, double quotes, heredoc sytnax and nowdoc syntax
<?php
$myString = "Hello World";
?>
Python[edit]
- Single quotes: 'allows embedded "double" quotes'[3]
- Double quotes: "allows embedded 'single' quotes".
- Triple quotes: Triple quoted strings may span multiple lines - all associated whitespace will be included in the string literal.[4]
myString = 'Hello World'
Javascript[edit]
- The use of double quotation marks allows you to use single quotation marks without having to escape them.
- The use of single quotation marks allows you to use double quotation marks without having to escape them.
Please see the example below [5]:
alert('Say "Hello"');
alert("Say 'Hello'");
var myString = "Hello World";
Standards[edit]
- Define the terms: variable, constant, operator, object.