NAME
    declare - Set variable values and attributes.

SYNOPSIS
    declare [-aAfFgilnrtux] [-p] [name[=value] ...]

DESCRIPTION
    Set variable values and attributes.
    
    Declare variables and give them attributes.  If no NAMEs are given,
    display the attributes and values of all variables.
    
    Options:
      -f	restrict action or display to function names and definitions
      -F	restrict display to function names only (plus line number and
    		source file when debugging)
      -g	create global variables when used in a shell function; otherwise
    		ignored
      -p	display the attributes and value of each NAME
    
    Options which set attributes:
      -a	to make NAMEs indexed arrays (if supported)
      -A	to make NAMEs associative arrays (if supported)
      -i	to make NAMEs have the `integer' attribute
      -l	to convert the value of each NAME to lower case on assignment
      -n	make NAME a reference to the variable named by its value
      -r	to make NAMEs readonly
      -t	to make NAMEs have the `trace' attribute
      -u	to convert the value of each NAME to upper case on assignment
      -x	to make NAMEs export
    
    Using `+' instead of `-' turns off the given attribute.
    
    Variables with the integer attribute have arithmetic evaluation (see
    the `let' command) performed when the variable is assigned a value.
    
    When used in a function, `declare' makes NAMEs local, as with the `local'
    command.  The `-g' option suppresses this behavior.
    
    Exit Status:
    Returns success unless an invalid option is supplied or a variable
    assignment error occurs.

SEE ALSO
    bash(1)

IMPLEMENTATION
    GNU bash, version 5.0.17(1)-release (x86_64-redhat-linux-gnu)
    Copyright (C) 2019 Free Software Foundation, Inc.
    License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>