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understanding code

• To: mathgroup at smc.vnet.net
• Subject: [mg114147] understanding code
• From: Sam Takoy <sam.takoy at yahoo.com>
• Date: Thu, 25 Nov 2010 05:57:27 -0500 (EST)

Hi,

The following code:

i[_] = 0;
i[1]++
i[1]++
i[1]++
i[1]++


return 0 1 2 3 4. I'd like to understand whats going on here. That is,

What is i?  Is it a function? And what is i[1]? Is it a function or a 
value? Etc...


Many thanks in advance,

Sam