Expr kunye nomyalelo we-calc: Sombulula izibalo zemathematika kwisiphelo

Ndingomnye wabo basoloko becwangcisa iscripts ukutshatyalaliswa ukusombulula iimeko zemihla ngemihlakrazula igama eligqithisiweyo le-AP/Router, iinkqubo ezizenzekelayo, njl.).

Ngamaxesha athile ndiye ndazifumana ndikwimfuno yokwabela ixabiso lendlela yokuchaza imathematika kwinto eguquguqukayo, okanye ndisebenze ngokulula ngamabinzana ezibalo, apho ndingena kwingxaki yokuba i-bash kunye nenkcazo yemathematika, izibalo azinabuhlobo kakhulu. Kwenzeka ukuba i-bash ayifani ne-python, singathini ukuguquguquka = ​​1+5/6 (umzekelo), kwi-Bash kufuneka sisebenzise umyalelo vakalisa o bala

Expr myalelo

Oko kukuthi, umyalelo we-expr usinceda ukusombulula iintetho zemathematika kwi-terminal, ngayo sinokubala into esiyifunayo. Umzekelo, ukuba sifuna isiphumo sika-1 + 2 * 8/3 sivele, sibeka i-terminal:

expr 1 + 2 \* 8 / 3

Kwaye umphumo uya kubonakala kwisikrini. Nanku umfanekiso wekhusi onemizekelo ethile:

Kwimeko apho sifuna ukwabela isiphumo sentetho yezibalo kuguqulo (Eks: 10/2), iyakuba ngolu hlobo:

variable=`expr 10 / 2`

Emva koko siyijonga nge:

echo $variable

Umyalelo weCalc

Le, ngokungafaniyo nale yangaphambili, ichanekile ngokwemigaqo yedesimali, umzekelo:

calc 15 / 4

Ingasibonisa: 3.75

Apha ndikushiyela umfanekiso weskrini onemizekelo emininzi:

Ewe, le yeyona nto bendifuna ukukuxelela yona.

Nangona kunjalo, kusekho ezinye iingcebiso ezinomdla kumyalelo ngamnye (ingakumbi i-calc), ndincoma ukuba ufunde le ncwadana:

man calc

man expr

Phendula nge quote