String

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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'
  • 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.[3]
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 [4]:

alert('Say "Hello"');
alert("Say 'Hello'");
var myString = "Hello World";

Standards[edit]

  • Define the terms: variable, constant, operator, object.

References[edit]

Give the precise meaning of a word, phrase, concept or physical quantity.

Give the precise meaning of a word, phrase, concept or physical quantity.