28 lines
559 B
Go
28 lines
559 B
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"math"
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"os"
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"strconv"
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)
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func main() {
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var radius, area float64
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radius, _ = strconv.ParseFloat(os.Args[1], 64)
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area = 4 * math.Pi * math.Pow(radius, 2)
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fmt.Printf("radius: %g -> area: %.2f\n",
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radius, area)
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}
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