CODEWITHSUNDEEP
bashshell
Amit Rout
Amit Rout

Reputation: 107

while loop does not honor loop condition

While Loop does not stop even after the condition -ge is not satisfied

$ cat looptest.sh
#!/bin/bash

function looptest()
{
    max=5
    while [ $max -ge 0 ]
    echo $max
    do
        max=`expr $max - 1`
    done
}

looptest

Am i missing anything here ?

Thanks

Upvotes: 1

Views: 52

Answers (1)

Andreas Louv
Andreas Louv

Reputation: 47099

The command is interpreted as:

while condition; do commands; done

In your case the condition is:

[ $max -ge 0 ]
    echo $max

Or more compact:

[ $max -ge 0 ]; echo $max

Since echo returns a successful status code, then the loop will never terminate, you should move the echo statement inside the do ... done block.

    while [ $max -ge 0 ]
    do
        echo $max
        max=`expr $max - 1`
    done

Upvotes: 6

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