Y must be a simple character scalar or vector containing an APL expression to be executed. The expression may contain one or more sub-expressions separated by ⋄ (Diamond) characters.
If the result of the expression is used or is assigned to a name, R is the result (if any) of the last-executed sub-expression and the non-shy results of all preceding expressions (that are not assigned within the expression) are displayed. Otherwise the unassigned non-shy results of all of the sub-expressions are displayed.
If the expression is an empty vector or a vector containing only blanks or one that does not produce a result, then ⍎Y has no value and using or assigning it to a name will generate VALUE ERROR.
If Y contains a branch expression, the branch is effected in the environment from which the Execute was invoked, and ⍎Y does not return.
If specified, X must be a namespace reference or a simple character scalar or vector representing the name of a namespace in which the expression is to be executed. If X is omitted or is an empty character vector, the expression is executed in the current space.
Examples
⍎'2+2'
4
⍎'1+1 ⋄ 2+2'
2
4
A← ⍎'1+1 ⋄ 2+2'
2
A
4
4=⍎'1+1 ⋄ 2+2'
2
1
⍎'A←2|¯1↑⎕TS ⋄ →0⍴⍨A ⋄ A'
0
A
0
A←⍎''
VALUE ERROR: No result was provided when the context expected one
A←⍎''
∧
'myspace' ⎕NS''
myspace⍎'A←⍳6'
myspace.A
1 2 3 4 5 6