variable declaration
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⟩ ⟩ variable
⟩ ⟩ declaration
(declaration) declares a var / let / const variable.
function () vs. variable declarations
function declaration is instantly fully initialized.
variable declarations is undefined/uninitialized initially.
📗 JS.info ⟩
(redeclaration ) JS is lenient with var, strict with let.
there is no type associated with variable declarations