{"id":226,"date":"2025-10-19T03:10:33","date_gmt":"2025-10-19T03:10:33","guid":{"rendered":"https:\/\/learn.rantissi.my.id\/?p=226"},"modified":"2025-10-19T03:10:55","modified_gmt":"2025-10-19T03:10:55","slug":"logika-kondisi-if-else-dan-pengambilan-keputusan-di-c","status":"publish","type":"post","link":"https:\/\/learn.rantissi.my.id\/index.php\/2025\/10\/19\/logika-kondisi-if-else-dan-pengambilan-keputusan-di-c\/","title":{"rendered":"Logika Kondisi (if\u2013else) dan Pengambilan Keputusan di C++"},"content":{"rendered":"\n

Apa Itu Percabangan (Decision Making)?<\/h2>\n\n\n\n

Dalam kehidupan nyata, kita sering membuat keputusan berdasarkan kondisi tertentu.
Misalnya:<\/p>\n\n\n\n

\n

Kalau hujan, bawa payung.
Kalau tidak hujan, tidak usah bawa payung.<\/p>\n<\/blockquote>\n\n\n\n

Nah, C++ juga bisa melakukan hal yang sama menggunakan struktur if\u2013else<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

Struktur Dasar if\u2013else<\/code><\/h2>\n\n\n\n
if (kondisi) {\n    \/\/ kode jika kondisi benar (true)\n} else {\n    \/\/ kode jika kondisi salah (false)\n}\n<\/code><\/pre>\n\n\n\n
Contoh 1: Mengecek Umur<\/h3>\n\n\n\n
#include <iostream>\nusing namespace std;\n\nint main() {\n    int umur;\n\n    cout << \"Masukkan umur Anda: \";\n    cin >> umur;\n\n    if (umur >= 17) {\n        cout << \"Anda sudah dewasa.\" << endl;\n    } else {\n        cout << \"Anda masih di bawah umur.\" << endl;\n    }\n\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n
Output<\/h3>\n\n\n\n
Masukkan umur Anda: 19\nAnda sudah dewasa.\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
Struktur if<\/code> Berantai (if\u2013else if\u2013else<\/code>)<\/h2>\n\n\n\n
Kita bisa membuat beberapa kondisi sekaligus.<\/p>\n\n\n\n
#include <iostream>\nusing namespace std;\n\nint main() {\n    int nilai;\n\n    cout << \"Masukkan nilai ujian: \";\n    cin >> nilai;\n\n    if (nilai >= 90) {\n        cout << \"Nilai Anda A\" << endl;\n    } else if (nilai >= 80) {\n        cout << \"Nilai Anda B\" << endl;\n    } else if (nilai >= 70) {\n        cout << \"Nilai Anda C\" << endl;\n    } else {\n        cout << \"Nilai Anda D\" << endl;\n    }\n\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n
Output<\/h3>\n\n\n\n
Masukkan nilai ujian: 82\nNilai Anda B\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
Operator Logika dalam Kondisi<\/h2>\n\n\n\n
Kita bisa menggabungkan beberapa kondisi dengan operator:<\/p>\n\n\n\n
    \n
  • &&<\/code> \u2192 AND<\/strong><\/li>\n\n\n\n
  • ||<\/code> \u2192 OR<\/strong><\/li>\n\n\n\n
  • !<\/code> \u2192 NOT<\/strong><\/li>\n<\/ul>\n\n\n\n
    Contoh 2: Menentukan Kelayakan SIM<\/h3>\n\n\n\n
    int umur;\nchar punyaSIM;\n\ncout << \"Masukkan umur: \";\ncin >> umur;\ncout << \"Apakah Anda sudah punya SIM? (y\/n): \";\ncin >> punyaSIM;\n\nif (umur >= 17 && punyaSIM == 'y') {\n    cout << \"Anda boleh mengemudi.\" << endl;\n} else {\n    cout << \"Anda belum boleh mengemudi.\" << endl;\n}\n<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    Catatan Penting<\/h2>\n\n\n\n
      \n
    • Pastikan kondisi dalam if<\/code> menghasilkan true<\/strong> atau false<\/strong>.<\/li>\n\n\n\n
    • Gunakan kurung kurawal {}<\/code><\/strong> untuk mengelompokkan blok kode lebih dari satu baris.<\/li>\n\n\n\n
    • Jika hanya satu baris, boleh tanpa {}<\/code>, tapi disarankan tetap pakai<\/strong> agar kode rapi dan aman.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
      Apa Itu Percabangan (Decision Making)? Dalam kehidupan nyata, kita sering membuat keputusan berdasarkan kondisi tertentu.Misalnya: Kalau hujan, bawa payung.Kalau tidak hujan, tidak usah bawa payung. Nah, C++ juga bisa melakukan hal yang sama menggunakan struktur if\u2013else. Struktur Dasar if\u2013else Contoh 1: Mengecek Umur Output Struktur if Berantai (if\u2013else if\u2013else) Kita bisa membuat beberapa kondisi sekaligus….<\/p>\n","protected":false},"author":1,"featured_media":201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,6],"tags":[],"class_list":["post-226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c","category-programming"],"_links":{"self":[{"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/posts\/226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/comments?post=226"}],"version-history":[{"count":1,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/posts\/226\/revisions"}],"predecessor-version":[{"id":227,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/posts\/226\/revisions\/227"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/media\/201"}],"wp:attachment":[{"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/media?parent=226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/categories?post=226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn.rantissi.my.id\/index.php\/wp-json\/wp\/v2\/tags?post=226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}