What does "<<" in "1000 << 16" mean in ruby?

What does "<<" in "1000 << 16" mean in ruby?

I know that for strings << can be used for concatenati开发者_运维百科on, but I don't understand what it does for ints. Could someone please explain?

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This is the left shift bitwise operator.

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What it should do is take the binary representation of one thousand and shift the bits to the left sixteen spaces. Effectively, it multiplies the number by 65,536.

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You can look it up in RDoc: http://www.ruby-doc.org/core/classes/Fixnum.html#M001102

fix << count → integer

Shifts fix left count positions (right if count is negative).