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Avoid printing leading zero

• To: mathgroup at smc.vnet.net
• Subject: [mg100741] Avoid printing leading zero
• From: Josà Lorenzana <lorenzana.jose at gmail.com>
• Date: Thu, 11 Jun 2009 21:47:10 -0400 (EDT)

How do you avoid printing the leading zero in -0.03? 
I need to construct the string "-.03" .

Something like this does not work: 
ToString at NumberForm[-0.3, {0, 2}]

Thanks a lot! 

José