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expr:tldr:1f2c3

expr: Get the length of a specific string.

expr

$ expr length "${string}"

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The command expr length "${string}" is used to determine the length of the string stored in the variable string.

Here's a breakdown of the command:

expr: It is a command used for numerical and string operations in Unix-like operating systems.
length: It is an operator in expr that calculates and returns the length of a string.
${string}: It refers to the variable string which contains the desired string.

When this command is executed, the expr command will calculate the length of the string stored in string and display the result.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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