E faʻafefea ona e tusia se taimi faʻaoga i Linux?
Syntax o le while loop:
- n=1. a o [ $n -le 5 ] fai. si'uleo "Taimi $n tamo'e" ((n++)) mae'a.
- n=1. a o [ $n -le 10 ] fai. afai [ $n == 6 ] ona. si'uleo "fa'amuta" malologa. fi. si'uleo “Tulaga: $n” ((n++ )) faia.
- n=0. a o [ $n -le 5 ] fai. (( n++ )) pe afai [ $n == 3 ] ona. faaauau. fi. si'uleo “Tulaga: $n” ua uma.
How do you use a while loop in Unix?
Syntax. O iinei e iloilo ai le poloaiga Shell. Afai e sa'o le tau e maua, o fa'amatalaga ua tu'uina atu e fa'atino. Afai e sese le poloaiga ona leai lea o se faʻamatalaga o le a faʻatinoina ma o le polokalame o le a oso i le isi laina pe a maeʻa le faʻamatalaga.
E fa'afefea ona e fa'aogaina se taimi fa'aoga?
The while loop evaluates the test expression inside the parenthesis () . If the test expression is true, statements inside the body of while loop are executed. Then, the test expression is evaluated again. The process goes on until the test expression is evaluated to false.
How do I read a while loop in Linux?
The following syntax is used for bash shell to read a file using while loop:
- while read -r line; do. echo “$line” ; done < input.file.
- while IFS= read -r line; do. echo $line; done < input.file.
- $ while read line; do. echo $line; done < OS.txt.
- #!/bin/bash. igoa faila='OS.txt' n=1. …
- #!/bin/bash. filename=$1. while read line; do.
E faʻafefea ona e taofi se matasele e le gata i Linux?
Le i'u a'o Loop
E mafai fo'i ona e fa'aogaina le mea moni ua fausia i totonu po'o so'o se isi fa'amatalaga e toe fo'i mai le moni. O le ta'amilosaga while i luga o le a tamo'e e le gata. E mafai ona e fa'amutaina le matasele e ala ile omi CTRL+C .
E fa'afefea ona e tapuni se taimi fa'aletonu?
E mafai fo'i ona fa'amuta le ta'amilosaga a le taimi pe a fai se malologa, goto, pe toe fo'i i totonu o le fa'amatalaga tino. Fa'aoga fa'aauau e fa'amutaina ai le fa'asologa o lo'o iai nei e aunoa ma le alu 'ese mai le fa'agasolo taimi. fa'aauau pea le fa'atonuga i le fa'asologa o lo'o soso'o mai o le fa'agasolo taimi. Ole tulaga fa'amutaina e iloiloina ile pito i luga ole matasele.
E faʻafefea ona e tusia se matasele mo le Unix?
O le var o le igoa lea o se fesuiaiga ma le upu1 i le upuN o faʻasologa o mataitusi e vavaeeseina e avanoa (upu). O taimi uma lava e fa'atino ai le matasele mo, o le tau o le fesuiaiga var e seti i le isi upu i le lisi o upu, upu1 i le upuN.
O fea o upu nei o lo'o fa'aogaina ile while loop?
O iinei, e tolu a matou upu autu, e pei o le taimi, fai ma faia. O le upu autu muamua 'while' e fa'ailoa mai ai le amataga o le matasele pe a tatou fa'agasolo le fa'ailoga atigi. E soso'o ai ma se tulaga o lo'o fa'amauina i puipui lapotopoto.
O le a le matasele i Linux?
O le matasele mo o le mea muamua lea o le tolu fau fa'apipi'i atigi. O lenei matasele e mafai ai ona faʻamaonia se lisi o tau. O se lisi o fa'atonuga e fa'atinoina mo tau ta'itasi i le lisi. O le syntax mo lenei matasele o le: mo IGOA [i le LIST]; fai POLOAIGA; faia.
What is while loop example?
A “While” Loop is used to repeat a specific block of code an unknown number of times, until a condition is met. For example, if we want to ask a user for a number between 1 and 10, we don’t know how many times the user may enter a larger number, so we keep asking “while the number is not between 1 and 10”.
O le a le fa'ata'ita'iga Loop?
A loop is used for executing a block of statements repeatedly until a particular condition is satisfied. For example, when you are displaying number from 1 to 100 you may want set the value of a variable to 1 and display it 100 times, increasing its value by 1 on each loop iteration.
What does while loop mean?
I le tele o gagana polokalame faakomepiuta, o le do while loop o se faʻamatalaga faʻatonutonu lea e faʻatino ai se poloka o code ia le itiiti ifo ma le tasi, ona faʻaauau pea ona faʻatino le poloka, pe taofi le faʻatinoina, e fuafua i se tulaga boolean ua tuʻuina atu i le pito o le poloka. .
O le a le uiga ile Linux?
I totonu o le lisi o loʻo i ai nei o se faila e taʻua o le "mean." Fa'aaoga lena faila. Afai o le poloaiga atoa lenei, o le faila o le a faʻatinoina. Afai o se finauga i se isi poloaiga, o lena poloaiga o le a faʻaaogaina le faila. Mo se fa'ata'ita'iga: rm -f ./mean.
E fa'afefea ona e faia se taimi fa'asolo ile bash?
E leai se fa'aoga fai-while i le bash. Ina ia faʻatino muamua se faʻatonuga ona faʻasolo lea o le matasele, e tatau ona e faʻatinoina le faʻatonuga muamua aʻo leʻi oʻo i le matasele pe faʻaaoga se matasele e le iʻu ma se tulaga malolo.
E fa'afefea ona e faitauina se faila i Linux?
O lo'o mulimuli mai nisi o auala aoga e tatala ai se faila mai le terminal:
- Tatala le faila e faʻaaoga ai le cat command.
- Tatala le faila e fa'aaoga ai le fa'atonuga itiiti.
- Tatala le faila e faʻaaoga atili ai le faʻatonuga.
- Tatala le faila e faʻaaoga ai le nl command.
- Tatala le faila e faʻaaoga ai le gnome-open command.
- Tatala le faila e faʻaaoga ai le pule ulu.
- Tatala le faila e faʻaaoga ai le tail command.