{"id":501,"date":"2019-05-04T17:59:46","date_gmt":"2019-05-04T17:59:46","guid":{"rendered":"http:\/\/kabiliravi.com\/?page_id=501"},"modified":"2019-07-21T13:47:54","modified_gmt":"2019-07-21T13:47:54","slug":"primitive-data-types","status":"publish","type":"page","link":"http:\/\/kabiliravi.com\/index.php\/software\/programming\/mycpptutorial\/basic-syntax\/primitive-data-types\/","title":{"rendered":"Primitive Data Types"},"content":{"rendered":"\n

Primitive types are the basic data types serve as the building blocks of data manipulation in any programming language including Java.<\/p>\n\n\n\n

In a programming language, a variable has a type such as Integer, String, Decimal, … whether that programming language is a Static Typing<\/a><\/strong> such as C\/C++ and Java or Dynamic Typing<\/a><\/strong> like PHP, javascript and Python. <\/p>\n\n\n\n

In C++ like other programming languages we have built-in primitive data types. A primitive date type is a basic data type<\/em> provided by a programming language as a basic building block.
Here is the list of primitive date types in C++:<\/p>\n\n\n\n
Group<\/strong><\/td>Keyword<\/strong><\/td>Size <\/strong><\/td><\/tr>
Boolean Types<\/td>bool<\/strong><\/td>8 bits<\/td><\/tr>
Character Types<\/td>char<\/strong><\/td>8 bits<\/td><\/tr>
Character Types<\/td>char16_t<\/strong><\/td>16 bits<\/td><\/tr>
Character Types<\/td>char32_t<\/strong><\/td>32 bits<\/td><\/tr>
Character Types<\/td>wchar_t<\/strong><\/td>gt<\/strong> 16 bits and lt<\/strong> 32 bits<\/td><\/tr>
Integer Types<\/td>char<\/strong><\/td>8 bits<\/td><\/tr>
Integer Types<\/td>int<\/strong><\/td>gt<\/strong> 16 bits and lt<\/strong> 32 bits<\/td><\/tr>
Integer Types<\/td>short<\/strong><\/td>16 bits<\/td><\/tr>
Integer Types<\/td>long<\/strong><\/td>32 bits<\/td><\/tr>
Integer Types<\/td>long long<\/strong><\/td>64 bits<\/td><\/tr>
Floating-point Types<\/td>float<\/strong><\/td>32 bits<\/td><\/tr>
Floating-point Types<\/td>double<\/strong><\/td>gt<\/strong> 32 bits and lt<\/strong> 64 bits<\/td><\/tr>
Floating-point Types<\/td>long double<\/strong><\/td>64 bits, lt double<\/strong><\/td><\/tr>
Void Type<\/td>void<\/strong><\/td>no storage<\/td><\/tr><\/tbody><\/table>\n\n\n\n

I created couple of samples in
https:\/\/github.com\/mycpptutorial\/primitive-data-types.git<\/a> to play with each type.<\/p>\n\n\n\n

In the first sample in trybool.cpp<\/strong>, you will learn how to define a boolean variable and how to set its value:<\/p>\n\n\n\n

\/** trybool.cpp<\/strong>**\/
#include <iostream>

int main (void){
  bool try_me = false;

  std::cout << \"try_me value: \";
  std::cout << try_me;
  std::cout << \"\\n\";

  try_me = true;
  std::cout << \"try_me value: \";
  std::cout << try_me;
  std::cout << \"\\n\";

  std::cout << \"The size of try_me is \";
  std::cout << sizeof try_me;
  std::cout << \" byte(s)\\n\";
}<\/pre>\n\n\n\n
You start all C++ executable application with a starter function called main()<\/strong>. Refer to Build You First Application<\/a> to have more information about it. As you see in the above sample, in the first line of main() function block, I defined a boolean variable simply by have bool<\/strong> type at the beginning of the line, then the variable name try_me<\/strong> right after that with a space character and assigned its value immediately on its declaration (definition) line with “= false<\/strong>“. Notice that all lines are ended by ; (semicolon)<\/strong> character.<\/p>\n\n\n\n
bool try_me = false;<\/pre>\n\n\n\n
Next, I have the text “The size of try_me is “<\/strong> printed with a cout<\/strong> function and belongs to std<\/strong> namesapce as std::cout<\/strong>.<\/p>\n\n\n\n
std::cout << \"try_me value: \";<\/pre>\n","protected":false},"excerpt":{"rendered":"
Primitive types are the basic data types serve as the building blocks of data manipulation in any programming language including Java. In a programming language, a variable has a type such as Integer, String, Decimal, … whether that programming language is a Static Typing such as C\/C++ and Java or Dynamic Typing like PHP, javascript […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":499,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-501","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/pages\/501","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/comments?post=501"}],"version-history":[{"count":40,"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/pages\/501\/revisions"}],"predecessor-version":[{"id":997,"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/pages\/501\/revisions\/997"}],"up":[{"embeddable":true,"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/pages\/499"}],"wp:attachment":[{"href":"http:\/\/kabiliravi.com\/index.php\/wp-json\/wp\/v2\/media?parent=501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}