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This article is about using while loops in bash shell scripts. Xiao Bian thinks it is quite practical, so share it for everyone to make a reference. Let's follow the editor and have a look.

Like the for loop, the while loop is a loop that starts with a constraint. This means that the condition needs to be checked before executing the while loop. In most cases, it also does all the work that a for loop can do, but it has its own programming advantages.

Grammar:

while [ condition ]do//execute done

Example of while loop in bash

For example, when the value of i is greater than 10, the following loop is executed 10 times and exits.

#!/ bin/bashi=1while [$i-le10]do echo "This is looping number $i" leti++done

while infinite loop in bash

An infinite for loop is an endless loop. The loop continues until it is forced to stop using ctrl+c.

#!/ bin/bashwhiletruedo echo "Press CTRL+C to Exit"done

But we can also use conditional statements like if to terminate the loop when certain conditions are matched.

#!/ bin/bashwhiletruedo if [ condition ];do exit fidone

In bash scripts, we can also write while loops similar to C.

#!/ bin/bashi=1while((i

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