NumberFormat Integer Grouping

Use NumberFormat.getIntegerInstance() to read a large integer and print it with comma grouping separators.

getIntegerInstance(Locale.US) creates a formatter that inserts commas every 3 digits from the right. Read the number with nextLong() or nextInt(), then pass it to nf.format().

⚠️ AUTO-INPUT MODE: The input stream will automatically contain '1000000\n'. Use Scanner's nextLong() or nextInt() to read it.

Expected Output:

Grouped: 1,000,000↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Miscellaneous

Code Editor

Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (sysout, psvm, fori)

Your Output

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Test Cases

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