str-length command

字符串长度

$ str="123.?+ abc"
$ echo "$str" | wc -L
10

$ str="123.?+ abc"
$ echo "$str" | awk -F "" '{print NF}'
10

$ str="123.?+ abc"
$ echo  "$str"| awk '{print length($0)}'
10

$ str="123.?+ abc"
$ echo ${#str}
10

$ str="123.?+ abc"
$ expr "$str" : ".*"
10