Methods for referencing shell variables in awk code

A fragrant chestnut is better than words

#!/bin/bashfoo= "Good" # Without spaces bar= "Hello World" # with spaces awk ' BEGIN {print ' $foo ' "; "'" $bar "'"} '

The pest above maintains the usual practice of enclosing the awk code in single quotes.

When you reference a shell variable in the awk code,

Use a pair of double quotation marks, with a pair of single quotes embedded,

In this pair of inner single quotes, press $var(for shell variables without spaces) or "$var"(both for shell variables with spaces, and for shell variables without spaces) a reference to a shell variable in the form of a

The scent of chestnuts is shown

The process of picking chestnuts

Methods for referencing shell variables in awk code