${(U)…}: Convert to uppercase

U converts all letters in the result to uppercase.

(L) is the opposite and converts to lowercase.

Links

• Zsh manual on parameter expansion flags

Examples

Convert array values to uppercase

1 2	declare data=(joe william jack averell) echo "Dalton brothers: ${(U)data}"

Output:

1	Dalton brothers: JOE WILLIAM JACK AVERELL