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AR삽질러

Ruby 定数　・　数値

Ruby 定数 定数（ていすう、じょうすう）Integer - 変化しない（または頻繫に変化しない）値を扱う時に使う ex) 手数料率、消費税率、円周率 irb#1(main):030> TAX = 1.08 => 1.08 irb#1(main):031> puts TAX 1.08 => nil irb#1(main):032> TAX_RATE = 1.08 => 1.08 irb#1(main):033> puts TAX_RATE 1.08 => nil irb#1(main):034> TAX_RATE = 1.1 (irb#1):34: warning: already initialized constant TAX_RATE (irb#1):32: warning: previous definition of TAX_RATE was here => 1.1 irb..
Ruby/Ruby-日本語 2023. 12. 13. 14:59
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