{"id":2734,"date":"2025-07-23T14:07:13","date_gmt":"2025-07-23T13:07:13","guid":{"rendered":"https:\/\/workboot.fr\/ciela\/?page_id=2734"},"modified":"2025-07-23T14:10:50","modified_gmt":"2025-07-23T13:10:50","slug":"td-script-shell-bash-factoriel","status":"publish","type":"page","link":"https:\/\/workboot.fr\/ciela\/td-script-shell-bash-factoriel\/","title":{"rendered":"TD script shell bash factoriel"},"content":{"rendered":"\n

version 1: lin\u00e9aire <\/h2>\n\n\n\n
\n#!\/bin\/bash<\/span>\n\n# V\u00e9rifie qu'un argument est fourni<\/span>\nif<\/b> [<\/span><\/b> $#<\/span> -ne<\/span> 1 ]<\/span><\/b>;<\/b> then<\/b>\n    echo<\/span><\/b> "Usage: <\/span>$0<\/span> <nombre>"<\/span>\n    exit<\/span><\/b> 1\nfi<\/b>\n\n# V\u00e9rifie que l'argument est un nombre positif<\/span>\nif<\/b> ! <\/span>[[<\/b> $1<\/span> =~<\/span> ^<\/span>[<\/span>0<\/span>-<\/span>9<\/span>]<\/span>+<\/span>$<\/span> ]]<\/b>;<\/b> then<\/b>\n    echo<\/span><\/b> "Erreur: L'argument doit \u00eatre un nombre entier positif."<\/span>\n    exit<\/span><\/b> 1\nfi<\/b>\n\nn<\/span>=<\/span>$1<\/span>\nfactorial<\/span>=<\/span>1\n\n# Calcul du factoriel<\/span>\nfor<\/b> ((<\/b> i<\/span>=<\/span>1<\/span>;<\/b> i<\/span><=<\/span>n<\/span>;<\/b> i<\/span>++<\/span> ))<\/b>;<\/b> do<\/b>\n    factorial<\/span>=<\/span>$((<\/span>factorial<\/span> *<\/span> i))<\/span>\ndone<\/b>\n\necho<\/span><\/b> "Factoriel de <\/span>$n<\/span> = <\/span>$factorial<\/span>"<\/span>\n<\/pre>\n\n\n\n\n
Analyser le code <\/h3>\n\n\n\n
Version 2, r\u00e9cursive<\/h2>\n\n\n\n
la fonction factorial  s’appelle elle m\u00eame jusqu\u2019\u00e0 la solution<\/p>\n\n\n\n
\n#!\/bin\/bash<\/span>\n\n# Fonction r\u00e9cursive pour calculer le factoriel<\/span>\nfactorial()<\/span> {<\/b>\n    local<\/span><\/b> n<\/span>=<\/span>$1<\/span>\n    # Cas de base : factoriel de 0 ou 1 vaut 1<\/span>\n    if<\/b> [<\/span><\/b> $n<\/span> -le<\/span> 1 ]<\/span><\/b>;<\/b> then<\/b>\n        echo<\/span><\/b> 1\n    else<\/b>\n        # Appel r\u00e9cursif : n! = n * (n-1)!<\/span>\n        local<\/span><\/b> prev<\/span>=<\/span>$(<\/span>factorial<\/span><\/b> $((<\/span>n<\/span> -<\/span> 1<\/span>))<\/span>)<\/span>\n        echo<\/span><\/b> $((<\/span>n<\/span> *<\/span> prev))<\/span>\n    fi<\/b>\n}<\/b>\n\n# V\u00e9rification des arguments<\/span>\nif<\/b> [<\/span><\/b> $#<\/span> -ne<\/span> 1 ]<\/span><\/b>;<\/b> then<\/b>\n    echo<\/span><\/b> "Usage: <\/span>$0<\/span> <nombre>"<\/span>\n    exit<\/span><\/b> 1\nfi<\/b>\n\nif<\/b> ! <\/span>[[<\/b> $1<\/span> =~<\/span> ^<\/span>[<\/span>0<\/span>-<\/span>9<\/span>]<\/span>+<\/span>$<\/span> ]]<\/b>;<\/b> then<\/b>\n    echo<\/span><\/b> "Erreur: L'argument doit \u00eatre un nombre entier positif."<\/span>\n    exit<\/span><\/b> 1\nfi<\/b>\n\n# Calcul et affichage du r\u00e9sultat<\/span>\nresult<\/span>=<\/span>$(<\/span>factorial<\/span><\/b> $1<\/span>)<\/span>\necho<\/span><\/b> "Factoriel de <\/span>$1<\/span> = <\/span>$result<\/span>"<\/span>\n<\/pre>\n\n\n\n\n
Analyser le code <\/h3>\n","protected":false},"excerpt":{"rendered":"
version 1: lin\u00e9aire #!\/bin\/bash # V\u00e9rifie qu’un argument est fourni if [ $# -ne 1 ]; then echo "Usage: $0 <nombre>" exit 1 fi # V\u00e9rifie que l’argument est un […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-2734","page","type-page","status-publish","hentry"],"yoast_head":"\nTD script shell bash factoriel - workboot<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/workboot.fr\/ciela\/td-script-shell-bash-factoriel\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TD script shell bash factoriel - workboot\" \/>\n<meta property=\"og:description\" content=\"version 1: lin\u00e9aire #!\/bin\/bash # V\u00e9rifie qu'un argument est fourni if [ $# -ne 1 ]; 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