' " — Character and string literals

'c' is one character. "text" is a string, a vector of characters of any length. '' and "" are the empty string.

⍴'a'               ⍝ ⍬ₓ
⍴"a"               ⍝ [1]ₓ
⍴""                ⍝ [0]ₓ

''' is the quote character. Inside a string, an apostrophe needs no escaping, and a double quote is written twice.

•ucs '''           ⍝ 39ₓ
≢"say ""hi"""      ⍝ 8ₓ

Literals separated by spaces form one vector: 'a' 'b' is "ab", and "aa" "bb" is a vector of two strings. See Characters and strings.

Errors

• SYNTAX: single quotes around more than one character, an unclosed literal