{"id":5228,"date":"2023-04-19T08:00:00","date_gmt":"2023-04-19T11:00:00","guid":{"rendered":"https:\/\/coodesh.com\/blog\/?p=5228"},"modified":"2024-01-05T07:39:45","modified_gmt":"2024-01-05T10:39:45","slug":"o-que-e-hello-world","status":"publish","type":"post","link":"https:\/\/coodesh.com\/blog\/dicionario\/o-que-e-hello-world\/","title":{"rendered":"O que \u00e9 Hello World?"},"content":{"rendered":"\n<p>Se voc\u00ea est\u00e1 interessado em ingressar na \u00e1rea tech, certamente j\u00e1 pesquisou sobre o que \u00e9 Hello World. Na verdade, essa express\u00e3o significa o <strong>primeiro contato do desenvolvedor com uma linguagem<\/strong> de programa\u00e7\u00e3o.&nbsp;<\/p>\n\n\n\n<p>Voc\u00ea sabia que existe at\u00e9 mesmo uma lenda com rela\u00e7\u00e3o ao uso do Hello World? Developers que n\u00e3o o utilizam t\u00eam <strong>longos anos de bugs<\/strong> pela frente com a linguagem escolhida.&nbsp;<\/p>\n\n\n\n<p>Portanto, sendo ou n\u00e3o da \u00e1rea, confira este conte\u00fado at\u00e9 o fim para saber qual \u00e9 a fun\u00e7\u00e3o desse recurso na vida de um programador.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Defini\u00e7\u00e3o&nbsp;<\/h2>\n\n\n\n<p>Hello World (ou Hello, World com v\u00edrgula devido ao vocativo) \u00e9 um programa simples que escreve a mensagem Hello World (Ol\u00e1, Mundo) na tela de um dispositivo. \u00c9 poss\u00edvel <strong>escrever a express\u00e3o em todas as linguagens<\/strong>, como JavaScript, Java, Rust, GoLang, C# e muitas outras.&nbsp;<\/p>\n\n\n\n<p>Em s\u00edntese, \u00e9 o primeiro contato do desenvolvedor com a linguagem. Atrav\u00e9s de poucas linhas de c\u00f3digo e de um editor de c\u00f3digo ou IDE (Integrated Development Environment ou Ambiente de Desenvolvimento Integrado) \u00e9 poss\u00edvel ver a m\u00e1gica acontecer.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hist\u00f3ria&nbsp;<\/h2>\n\n\n\n<p>A express\u00e3o foi usada pela primeira vez pelo <strong>cientista da computa\u00e7\u00e3o canadense <\/strong><a href=\"https:\/\/pt.wikipedia.org\/wiki\/Brian_Kernighan\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Brian Kernighan<\/strong><\/a><strong> no ano de 1973<\/strong>. Ele a usou na pesquisa \u201cA Tutorial Introduction to the Programming Language B\u201d, publicada antes do livro \u201cC Programming Language\u201d, que \u00e9 um dos mais conhecidos na \u00e1rea.\u00a0<\/p>\n\n\n\n<p>Brian n\u00e3o sabe ao certo porque deu esse nome ao primeiro programa. Em uma entrevista, ele disse apenas que viu a express\u00e3o Hello World em uma imagem de um pintinho saindo de um ovo.&nbsp;<\/p>\n\n\n\n<p>E como a ideia do enunciado \u00e9 justamente mostrar que o c\u00f3digo est\u00e1 \u201cnascendo\u201d, a express\u00e3o colou e at\u00e9 hoje \u00e9 usada.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vantagens&nbsp;<\/h2>\n\n\n\n<p>\u00c9 muito \u00fatil treinar suas primeiras linhas de c\u00f3digo com o Hello World. Afinal, al\u00e9m de livrar-se da \u201cmaldi\u00e7\u00e3o\u201d que comentamos acima, o recurso traz outras vantagens. Veja a seguir:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Verifica se um <strong>ambiente est\u00e1 preparado<\/strong> para a linguagem de programa\u00e7\u00e3o, pois a m\u00e1quina pode requerer outras configura\u00e7\u00f5es;&nbsp;<\/li><li>Possibilita apresentar os <strong>conceitos b\u00e1sicos<\/strong>, como fun\u00e7\u00f5es, estruturas de controle, entrada e sa\u00edda de dados;&nbsp;<\/li><li>Treina a<strong> l\u00f3gica de programa\u00e7\u00e3o<\/strong>, que \u00e9 um conjunto de regras que define como um programa deve ser constru\u00eddo.&nbsp;&nbsp;<\/li><\/ul>\n\n\n\n<p>Dessa forma, quando a frase Hello World aparece escrita na tela o programador entende que o seu c\u00f3digo est\u00e1 pronto para carregar, executar e compilar. Afinal, o primeiro Hello World a gente nunca esquece! \u00c9 como se fosse um rito de passagem.&nbsp;<\/p>\n\n\n\n<p>Mas o que fazer se ap\u00f3s ter escrito o c\u00f3digo, a frase n\u00e3o aparecer na tela? \u00c9 preciso ler o erro para depois resolv\u00ea-lo. Verifique se esqueceu de instalar algo. Preste aten\u00e7\u00e3o se usou alguma m\u00e1quina virtual para executar a linguagem no computador. Sobretudo, reinicie a m\u00e1quina ap\u00f3s a instala\u00e7\u00e3o de alguma ferramenta.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o&nbsp;<\/h2>\n\n\n\n<p>Entender o que \u00e9 Hello World \u00e9 o primeiro passo para testar suas habilidades iniciais em programa\u00e7\u00e3o. N\u00e3o pule etapas, aprenda os fundamentos da linguagem de programa\u00e7\u00e3o e siga em frente!<\/p>\n\n\n\n<p>Que tal aprender mais termos que ser\u00e3o usados na sua jornada DEV? Confira no <a href=\"https:\/\/coodesh.com\/blog\/dicionario\/\" target=\"_blank\" rel=\"noreferrer noopener\">Dicion\u00e1rio Tech <\/a>da Coodesh.\u00a0E se ainda n\u00e3o conhece a plataforma, aproveite para conferir o que \u00e9 a <a href=\"https:\/\/coodesh.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Coodesh <\/a>e como fazer a sua conta gratuita como DEV. Agora, se voc\u00ea \u00e9 um recrutador especializado interessado nos temas tech, <a href=\"https:\/\/coodesh.com\/contrate-desenvolvedores\" target=\"_blank\" rel=\"noreferrer noopener\">crie seu cadastro<\/a> e comece a utilizar nossos servi\u00e7os.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Se voc\u00ea est\u00e1 interessado em ingressar na \u00e1rea tech, certamente j\u00e1 pesquisou sobre o que \u00e9 Hello World. Na verdade, essa express\u00e3o significa o primeiro contato do desenvolvedor com uma linguagem de programa\u00e7\u00e3o.&nbsp; Voc\u00ea sabia que existe at\u00e9 mesmo uma lenda com rela\u00e7\u00e3o ao uso do Hello World? Developers que n\u00e3o o utilizam t\u00eam longos [&hellip;] <a class=\"g1-link g1-link-more\" href=\"https:\/\/coodesh.com\/blog\/dicionario\/o-que-e-hello-world\/\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":5229,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[191],"tags":[257,316,46,221,339,58,161,105],"class_list":{"0":"post-5228","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-dicionario","8":"tag-codigo","9":"tag-codigo-fonte","10":"tag-desenvolvedor","11":"tag-dicionario","12":"tag-linguagem","13":"tag-programacao","14":"tag-tech-recruiter","15":"tag-tecnologia"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>O que \u00e9 Hello World?<\/title>\n<meta name=\"description\" content=\"Saiba o que \u00e9 \u201cHello World\u201d, o primeiro contato do desenvolvedor com uma linguagem de programa\u00e7\u00e3o.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/coodesh.com\/blog\/dicionario\/o-que-e-hello-world\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O que \u00e9 Hello World?\" \/>\n<meta property=\"og:description\" content=\"Saiba o que \u00e9 \u201cHello World\u201d, o primeiro contato do desenvolvedor com uma linguagem de programa\u00e7\u00e3o.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/coodesh.com\/blog\/dicionario\/o-que-e-hello-world\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog: Recrutar Desenvolvedores e Conte\u00fado de Programa\u00e7\u00e3o\" \/>\n<meta property=\"article:published_time\" content=\"2023-04-19T11:00:00+00:00\" \/>\n<meta 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