18 lines
589 B
Markdown
18 lines
589 B
Markdown
### isArmstrongNumber
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Checks if the given number is an armstrong number or not.
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Convert the given number into array of digits. Use `Math.pow()` to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return `true` otherwise `false`.
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```js
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const isArmstrongNumber = digits => {
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let total = 0, arr = (digits+"").split("");
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arr.map(d => total += Math.pow(parseInt(d), arr.length))
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if(total === digits) return true; return false;
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}
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// isArmstrongNumber(1634) -> true
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// isArmstrongNumber(371) -> true
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// isArmstrongNumber(56) -> false
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```
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