c:\test>perl -wle"print for scalar 'a','b','c'"
a
b
c

c:\test>perl -wle"@a = (1,2,3); print for @a"
1
2
3

c:\test>perl -wle"@a = 1,2,3; print for @a"
Useless use of a constant in void context at -e line 1.
Useless use of a constant in void context at -e line 1.
1