Length of an arc between two angles: Difference between revisions
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<pre>arc length: 43.633231299858</pre>
=={{header|Nim}}==
<lang Nim>import math, strformat
func arcLength(r, a, b: float): float =
## Return the length of the major arc in a circle of radius "r"
## between angles "a" and "b" expressed in radians.
let d = abs(a - b)
result = r * (if d >= PI: d else: 2 * PI - d)
echo &"Arc length: {arcLength(10, degToRad(10.0), degToRad(120.0)):.5f}"</lang>
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<pre>Arc length: 43.63323</pre>
=={{header|Perl}}==
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