# array with no elements
a = [] 
# 1-dimensional array 
b = [4, 5, 6]   
println("b =",b)
println("first =",b[1])   # this is 4
println("last  =",b[end]) # this is 6
# 2-dimensional arrays 
m  = [1 2 4; 3 4 5]
println("m=", m)
println("first =",m[1,1])     # this is 4
println("last  =",m[end,end]) # this is 5    
