Bash arithmetic integer expansion

• https://tldp.org/LDP/abs/html/arithexp.html

$(( )) arithmetic expansion

line 5: 0.1: syntax error: invalid arithmetic operator (error token is ".1")

Related

• let
• Expansion
• expr
• Integer

See also

• Integer, int, float, double,
• Bash [ -c ], alias, &&, Bash history, Autocompletion, set, unset, export, .bash_aliases, .bashrc and .bash profile, PS1, echo, brace expansion, Function, shopt, trap, set -e, source, PATH, complete, disown, .hushlogin, .bashrc, builtin, eval, set, $PATH, $HOME, TZ, .profile, -e, -i, Builtin (Bash), mapfile, ~, return (Bash), for, until, declare, dirname, basename, functions.sh, Bash arithmetic expansion, shift, bash --rcfile, readonly