13 lines
397 B
Rust
13 lines
397 B
Rust
pub fn is_armstrong_number(num: u32) -> bool {
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let Some(count) = num.checked_ilog10().map(|count| count + 1) else {
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return true;
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};
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let armstrong_sum = (0..count).map(|i| {
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let divisor = 10u32.pow(i);
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let quotient = num / divisor;
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let digit = quotient % 10;
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let raised = digit.pow(count);
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raised
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}).sum();
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num == armstrong_sum
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}
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