Shell gets string length

Method 1: Use the wc-l command
Wc-l can get the length of the current row, so the string for a single row can be obtained in this simple way, and the wc-l is the number of rows that get the current string content.

The code is as follows: Echo "ABC" |wc-l

Method 2:expr Length string
Use expr length to get the lengths of a string

Method 3:awk Gets the number of fields, but if there is a problem when the length is greater than 10 characters, you need to confirm later

The code is as follows: Echo "abc" |awk-f "" ' {print NF} '

Method 4: Get the string length by awk+length

The code looks like this: echo "Alex" |awk ' {print length ($)} '

Method 5: Via Echo ${#string} (Note: String here is the variable name of the string)

The code is as follows: Name=alex
echo ${#name}

Shell gets string length