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Nested Loops: Number Triangle

Use nested loops to print a triangle where row 1 is 1, row 2 is 12, and so on up to row 4. Each row starts at 1 and counts up to the row number.

Expected Output:

1
12
123
1234

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

Hints4 available
Topics:
Loops
1
Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (clog, fn, fori)

Your Output

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Test Cases

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