Generally, they share several syntactic features; use of:

Balanced brackets { and } also called "brace brackets" or simply "braces", to define blocks in their syntax or formal grammar.

Semicolons ; as statement terminators, not as separators.

Three-part "for" statement syntax.

Ignore whitespace: compilers or interpreters treat all contiguous, adjacent non-characters (tabs, spaces) as one blank space; also called free-form languages.