{"id":3778,"date":"2020-09-06T22:07:24","date_gmt":"2020-09-06T13:07:24","guid":{"rendered":"https:\/\/katblog.manadream.net\/?p=3778"},"modified":"2020-10-11T22:06:16","modified_gmt":"2020-10-11T13:06:16","slug":"writing-loop-processes-for-statement","status":"publish","type":"post","link":"https:\/\/katblog.manadream.net\/index.php\/2020\/09\/06\/writing-loop-processes-for-statement\/","title":{"rendered":"[PHP]Let’s Try Writing Loop Processes! [for statement] [Programming for Kids and Above #7]"},"content":{"rendered":"

Hello!<\/p>\n

I’m kat, the manager of ‘kat’s blog’.<\/p>\n

This time, which is the seventh installment of the ‘Programming Lessons’ series, I will be talking about loop<\/span> processing.<\/p>\n

In our daily lives, we do certain things over and over again<\/span>, right?<\/p>\n

For instance, when going to school, we take the same route at the same time everyday.<\/p>\n

It’s a hassle to have to write out the same process<\/span> over and over again to do something repeatedly in programming.<\/p>\n

Actually, there is a way to write it out very easily<\/span>.<\/p>\n

Let’s learn how to do that this time!<\/p>\n\n\n

What we will use this time<\/h2>\n\n\n

The programming language we will use this time<\/div>

<\/p>\n

This time we will use the following programming language to write out a program.<\/p>\n

\n

\u30fbPHP<\/p>\n<\/div>\n

<\/p><\/div><\/p>\n

The programming environment we will use this time<\/div>

<\/p>\n

Let’s use the paiza website which is listed below for executing the program.<\/p>\n

paiza website<\/a><\/span><\/span><\/p>\n

\u203bFor those who are using this for the first time, please check the page below. It gives instructions on how to use the website.<\/p>\n

https:\/\/katblog.manadream.net\/index.php\/2020\/06\/09\/how-to-use-paiza-io\/<\/p>\n

<\/p><\/div><\/p>\n\n\n

What is loop processing?<\/h2>\n\n\n

As I said in the beginning, loop processing is to do the same thing over and over again<\/span> many times.<\/p>\n

In loop processing, the same process will be repeated for as many times as you choose.<\/p>\n

\"\"<\/p>\n

Once the first process is finished, the second process will start after it has returned to the beginning of the loop.<\/p>\n\n\n

Let’s write out a loop process<\/h2>\n\n\n

Now then, let’s actually write out a loop process.<\/p>\n

For this time, let’s make it so that to the numbers; 1,2,3,4,5,6,7,8,9, 2 will be added to each of them, and the numbers will be displayed in order.<\/p>\n

You can think of the process to go like this.<\/p>\n

\"\"<\/p>\n

This will be repeated a total of nine times<\/span> from 1~ 9.<\/p>\n

Now, let’s take a look at the source code.<\/p>\n\n

\n<?php\n\n\/\/ Repeat for 1~9\nfor ($i = 1; $i < 10; $i++) {\n  \/\/ Display after adding 2\n  $result = $i + 2;\n  echo $result . ",";\n}\n<\/pre><\/div>\n\n
When this is executed,<\/p>\n\n
\n3,4,5,6,7,8,9,10,11,\n<\/pre><\/div>\n\n
the result will be displayed as shown above.<\/p>\n
As you can see, 2 has been added to each number without fail.<\/p>\n
\uff5eExplanation 1\uff5e<\/div>
<\/p>\n\n
\n\/\/ Repeat for 1~9\nfor ($i = 1; $i < 10; $i++) {\n<\/pre><\/div>\n\n
This is called a for statement, and is used when doing loop processing.<\/p>\n
The process that is written after the ‘{‘ of the for statement will be executed repeatedly.<\/p>\n
Also this time, the numbers from 1~9 will be in the ‘$i’ variable. (The variable can be named freely<\/span>)<\/p>\n
‘$i = 1;’ which is within the ‘()’ of the for statement, means that the numbers that are in ‘$i’ start from 1.<\/p>\n
‘$i < 10;’ means that the process will be repeated while ‘$i’ is smaller than 10.<\/p>\n
The ‘$i++’ at the end means that 1 will be added each time ‘$i’ loops around.<\/p>\n
\u2713 Point<\/div>
<\/p>\n
By changing the value in the ‘()’ of the for statement, you can freely change the number of times the loop repeats<\/span>.<\/p>\n
‘for ($i = 1; $i < 366; $i++) {‘<\/p>\n
By making it this way, we can make it repeat 365 times.<\/p>\n
The ‘<‘ used in ‘$i < 366;,’ means ‘less than ~,’ so the number that comes to the right of it needs to be 1 larger than the maximum number.<\/p>\n
However, if ‘<=’ is used, this means ‘less than or equal to ~,’ so in that case there is no problem in making the maximum number ‘365.’<\/p>\n
<\/p><\/div>\n
<\/p><\/div><\/p>\n
\uff5eExplanation 2\uff5e<\/div>
<\/p>\n\n
\n    \/\/ Add 2 and display\n    $result = $i + 2;\n    echo $result . ",";\n<\/pre><\/div>\n\n
This is a review of up until last time. The following process is being executing in order.<\/p>\n
\n
\u30fbAdd 2 to ‘$i,’ and enter the result in ‘$result.’<\/p>\n
\u30fbOutput ‘$result’ and ‘,’ on the screen.<\/p>\n<\/div>\n
<\/p><\/div><\/p>\n\n\n
Final thoughts<\/h2>\n\n\n
Thank you for reading to the end of this lesson this time as well.<\/p>\n
This time we learned about for statements<\/span> of loop processing, but I think you now understand how useful they are when you want to do multiple processes of the same kind.<\/p>\n
\u00a0<\/p>\n
I explained about loop processing this time as well, but this almost always comes up when doing programming, so please try to memorize it!<\/p>\n
See you next time!<\/p>\n\n\n
\n\n\n\n
\n
\n
<< Proceed to previous article<\/a><\/div>\n<\/div>\n\n\n\n
\n
Proceed to next article >><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Hello! I#8217;m kat, the manager of #8216;kat#8217;s blog#8217;. This time, which is the seventh installme<\/p>\n","protected":false},"author":1,"featured_media":4162,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_locale":"ja","_original_post":"https:\/\/katblog.manadream.net\/?p=3778","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[102],"tags":[107,108],"class_list":["post-3778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming-lessons","tag-english","tag-programming","ja"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/katblog.manadream.net\/wp-content\/uploads\/2020\/10\/kurumaa.png","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paUgnN-YW","_links":{"self":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3778"}],"collection":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/comments?post=3778"}],"version-history":[{"count":45,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3778\/revisions"}],"predecessor-version":[{"id":4171,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3778\/revisions\/4171"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/media\/4162"}],"wp:attachment":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/media?parent=3778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/categories?post=3778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/tags?post=3778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}