What are the methods of calculating string length in Shell scripts

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Method 1: use the wc-L command

Wc-L can get the length of the current line, so you can use this simple method to get the string of individual lines, and wc-l is the number of lines that get the contents of the current string.

The code is as follows:

Echo "abc" | wc-L

Method 2: expr length string

Use expr length to get the length of the string

Method 3: awk gets the number of fields, but if there is a problem if 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 is as follows:

Echo "Alex" | awk'{print length ($0)}'

Method 5: through echo ${# string} (note: string here is the variable name of the string)

The code is as follows:

Name=Alex

Echo ${# name}

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