Parrot - 操作

你可以执行各种操作。例如，我们能够打印出某个寄存器或常量的内容

set I1, 10
print "The contents of register I1 is: "
print I1
print "\n"

上面的指令将生成 寄存器 I1 的内容是：10

我们可以在寄存器上执行数学运算

# Add the contents of I2 to the contents of I1
add I1, I1, I2

# Multiply I2 by I4 and store in I3
mul I3, I2, I4

# Increment I1 by one
inc I1

# Decrement N3 by 1.5
dec N3, 1.5

我们甚至还可以执行一些简单的字符串操作

set S1, "fish"
set S2, "bone"
concat S1, S2       # S1 is now "fishbone"

set S3, "w"
substr S4, S1, 1, 7

concat S3, S4       # S3 is now "wishbone"
length I1, S3       # I1 is now 8