Why does the first bash var work but not the other? Trying to increment string ints-CodePudding

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Why does the first bash var work but not the other? Trying to increment string ints

Time：08-10

Where it worked...

tt=0000005

echo $((tt))

tt=$(($tt 1))

echo $((tt))

Somewhere it stopped working...

tt=0056505

echo $((tt))

tt=$(($tt 1))

echo $((tt))

23877

23878

CodePudding user response：

You need to trim the leading zeros first

$ tt=0056505
$ tt=$(echo $tt | sed 's/^[0]*//g')
$ echo $((tt))
56505
$ tt=$(($tt 1))
$ echo $((tt))
56506