String: Difference between revisions
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== Example == | == Example == | ||
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. | |||
<syntaxhighlight lang="php"> | |||
<?php | |||
$a = 1234.65; // decimal number | |||
$a = -1234.54; // a negative number | |||
?> | |||
</syntaxhighlight> | |||
In Python: | |||
* Single quotes: 'allows embedded "double" quotes' | |||
* Double quotes: "allows embedded 'single' quotes". | |||
* Triple quoted: '''Three single quotes''', """Three double quotes""" | |||
Triple quoted strings may span multiple lines - all associated whitespace will be included in the string literal.<ref>https://docs.python.org/3/library/stdtypes.html</ref> | |||
<syntaxhighlight lang="python3"> | |||
myString = 'Hello World' | |||
</syntaxhighlight> | |||
In Javascript: | |||
<syntaxhighlight lang="javascript"> | |||
// decimal number: | |||
var a = 1234.65; | |||
// a negative number: | |||
var a = -1234.65; | |||
</syntaxhighlight> | |||
== Do you understand this? == | == Do you understand this? == | ||
Revision as of 05:15, 7 August 2017
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].
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
$a = 1234.65; // decimal number
$a = -1234.54; // a negative number
?>
In Python:
- Single quotes: 'allows embedded "double" quotes'
- Double quotes: "allows embedded 'single' quotes".
- Triple quoted: Three single quotes, """Three double quotes"""
Triple quoted strings may span multiple lines - all associated whitespace will be included in the string literal.[3]
myString = 'Hello World'
In Javascript:
// decimal number:
var a = 1234.65;
// a negative number:
var a = -1234.65;
Do you understand this?[edit]
Standards[edit]
- Define the terms: variable, constant, operator, object.