bash: Use specific length of characters of a variable.

hoodedvul

Take into account the main readme for this section. README first.

Syntax is:
${name:start} or ${name:start:length} count begins with zero

Here we start the count at 4

$ ClimateChange=LessDeforestation
$ Amazon=${ClimateChange:4}
$ echo $Amazon
Deforestation

Using the start count with a length. First a length of 2 and both start count and the length can be arithmetic expressions.

$ Amazon=${ClimateChange:4:2}
$ echo $Amazon
De
$ Amazon=${ClimateChange:4:-2}
$ echo $Amazon
Deforestati