{"id":4883,"date":"2021-07-14T00:58:29","date_gmt":"2021-07-14T03:58:29","guid":{"rendered":"https:\/\/bureau-it.com\/artigos\/using-echo\/"},"modified":"2024-09-19T22:34:31","modified_gmt":"2024-09-20T01:34:31","slug":"using-echo","status":"publish","type":"post","link":"https:\/\/bureau-it.com\/en\/artigos\/using-echo\/","title":{"rendered":"Using echo"},"content":{"rendered":"\n<p><code data-enlighter-language=\"generic\" class=\"EnlighterJSRAW\">man<\/code> is very direct in saying that the <code data-enlighter-language=\"generic\" class=\"EnlighterJSRAW\">echo<\/code> command is used to repeat arguments to std out.\nAnd that means passing practically anything to standard output.\nWith echo we can use escape characters, such as tabulation, new line, activate <a href=\"https:\/\/bureau-it.com\/artigos\/como-exibir-cores-no-terminal\/\" target=\"_blank\" rel=\"noreferrer noopener\">text colors, background, character decoration,<\/a> etc.  <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-escape\">Escape<\/h2>\n\n<p>Without <strong>-e<\/strong>, it can&#8217;t interpret escaped commands.<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo \"Oi\\nEu sou o Echo.\"\nOi\\nEu sou o Echo.<\/pre>\n\n<p>With <strong>-e<\/strong>, you enable the interpretation of escaped characters, such as \\n to skip lines:<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo -e \"Oi\\nEu sou o Echo.\"\nOi\nEu sou o Echo.<\/pre>\n\n<p>For a new column <strong>,<\/strong> use the <strong>-e<\/strong> option with <strong>\\v<\/strong>:<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ Nome=\"Echo\"\n$ echo -e \"Oi\\nSeu nome \u00e9 $Nome \\v$Nome \\v$Nome\"\nOi\nSeu nome \u00e9 Echo\n                  Echo\n                         Echo<\/pre>\n\n<p>To re-tab use the <strong>-e<\/strong> option with <strong>\\t<\/strong>:<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo -e \"\\tOl\u00e1,\\n\\tEste \u00e9 um texto tabulado.\"\n    Ol\u00e1,\n    Este \u00e9 um texto tabulado.<\/pre>\n\n<h2 class=\"wp-block-heading\" id=\"h-evitar-newline\">Avoid newline<\/h2>\n\n<p>If you don&#8217;t set the -n option, the information will be displayed on the screen, then a new line will appear:<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo \"Oi, digite seu nome: \"; read nome\nOi, digite seu nome: \n_<\/pre>\n\n<p>Now, with -n, we no longer have a <em>newline<\/em> after the sentence:<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo -n \"Oi, digite seu nome: \"; read nome\nOi, digite seu nome: _ <\/pre>\n\n<p>This new line that <code data-enlighter-language=\"generic\" class=\"EnlighterJSRAW\">echo<\/code> creates can get in the way when it comes to getting the hexadecimal of a character<\/p>\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ echo -e A |hexdump\n0000000 41 0a &lt;----- olha o newline aqui no 0a, atrapalhando\n0000002\n\n$ echo -en A |hexdump\n0000000 41 &lt;----- agora, s\u00f3 o hex 41, que \u00e9 o A em ascii\n0000001<\/pre>\n\n<p>Do you have any suggestions on how to use echo?\nSend it to me in the comments and I&#8217;ll insert it here =D <\/p>\n","protected":false},"excerpt":{"rendered":"<p>A quick guide on how to use the echo command in the most practical way possible.<\/p>\n","protected":false},"author":2,"featured_media":4621,"comment_status":"open","ping_status":"closed","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,"_jetpack_memberships_contains_paid_content":false,"resumo_insta":"","imagem_insta":"","acessibilidade_insta":"","hashtags_insta":"","resumo_linkedin":"","imagem_linkedin":"","hashtag_linkedin":"","resumo_face":"","imagem_face":"","hashtag_face":"","footnotes":""},"categories":[96],"tags":[98],"class_list":["post-4883","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shell-script-en","tag-echo-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Using echo - bureau-it.com<\/title>\n<meta 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