ScriptingLesson 47Free preview

Bash Data Types

This lesson is part of Bash · All levels

Summary

Bash is a language without strict data types, all values are basically stored as strings including numbers. Arithmetic operations are performed within the arithmetic expression or let command, whereas tests such as -n and -z check the string. You can force the type by declare -i to an integer.

Key points

All the base values are stored as strings
Declare -i marks the variable as an integer
Arithmetic expression $(((a + b)) counting numbers
Test -n and -z check whether the string is empty or not

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.