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TomckySan/fillzero.rb

Last active November 29, 2016 05:33
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桁数指定ゼロ埋め
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fillzero.rb
# % (String) - https://docs.ruby-lang.org/ja/latest/class/String.html#I_--25
puts "%02d" % 0 # 00
puts "%02d" % 9 # 09
puts "%02d" % 99 # 99
puts "%02d" % 100 # 100
puts "%04d" % 0 # 0000
puts "%04d" % 9 # 0009
puts "%04d" % 99 # 0099
puts "%04d" % 100 # 0100
puts "%04d" % 9999 # 9999
puts "%04d" % 99999 # 99999
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