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← Back to docs ({{ backToDocsLabel }}) main.rb

ruby output {{ formatNotice }} loading… ready

try

editor theme

{{ syntaxErrors.length }} syntax error{{ syntaxErrors.length > 1 ? 's' : '' }} — fix before running

{{ err.message }}

{{ syntaxWarnings.length }} warning{{ syntaxWarnings.length > 1 ? 's' : '' }}

{{ w.message }}

{{ wasmProgress != null ? ('# Loading Ruby runtime (~10 MB)… ' + wasmProgress + '%') : '# Loading Ruby runtime (~10 MB)…' }}{{ rubyReady ? '# Click Run to execute your Ruby code' : '# Press Run — Ruby (a ~10 MB download) loads the first time' }}

✗ {{ syntaxErrors.length }} syntax error{{ syntaxErrors.length > 1 ? 's' : '' }} checking syntax… ✓ no syntax errors checked as you type ruby {{ wasmVersion }} · downloading ruby {{ rubyVersion || wasmVersion }} ruby {{ wasmVersion }} · loads on first run last run {{ lastRunMs }} ms Ln {{ editorCursor.line }}, Col {{ editorCursor.col }} {{ editorCursor.lines }} {{ editorCursor.lines === 1 ? 'line' : 'lines' }} {{ keys.format }} format © ruby.help