#testmode:repl

# range with map
list(range(10).map(@x { x * x }))

# range with filtering map
list(range(10).map(@x { if x % 2 == 0 x * x }))

#---
#(0, 1, 4, 9, 16, 25, 36, 49, 64, 81)
#(0, 4, 16, 36, 64)