is there a way to change case to low or high whole block in visual mode vim?

Question

Want to change case to lower in whole block in visual mode. If i want to change case of a single character, i can press ~, but what i need to use in visual mode for changing in selected area into low or high case ?

Answer 1

• The ~ also works on visual blocks and 'inverts' the casing (lowercase becomes uppercase, uppercase becomes lowercase)
• u makes the selection lower case (regardless on the original casing)
• U makes the selection upper case (regardless on the original casing)