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authorakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-05-13 10:36:52 (GMT)
committerakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-05-13 10:36:52 (GMT)
commite7ba39350a1ed1ab2789afe4f2401a7f54ff8bb4 (patch)
tree309f95d6f55e30ad436497c68b0fbc4f7dd5c2f7 /math.c
parent8265f3125e7201d8fc1af8bf778fd6cede6900db (diff)
rdoc update.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'math.c')
-rw-r--r--math.c57
1 files changed, 28 insertions, 29 deletions
diff --git a/math.c b/math.c
index 36ad020..6273d60 100644
--- a/math.c
+++ b/math.c
@@ -600,38 +600,37 @@ math_erfc(VALUE obj, VALUE x)
*
* Calculates the gamma function of x.
*
- * Note that gamma(n) is same as fact(n-1) for integer n >= 0.
+ * Note that gamma(n) is same as fact(n-1) for integer n > 0.
* However gamma(n) returns float and possibly has error in calculation.
*
* def fact(n) (1..n).inject(1) {|r,i| r*i } end
- * 0.upto(25) {|i| p [i, Math.gamma(i+1), fact(i)] }
- * #=>
- * [0, 1.0, 1]
- * [1, 1.0, 1]
- * [2, 2.0, 2]
- * [3, 6.0, 6]
- * [4, 24.0, 24]
- * [5, 120.0, 120]
- * [6, 720.0, 720]
- * [7, 5040.0, 5040]
- * [8, 40320.0, 40320]
- * [9, 362880.0, 362880]
- * [10, 3628800.0, 3628800]
- * [11, 39916800.0, 39916800]
- * [12, 479001600.0, 479001600]
- * [13, 6227020800.0, 6227020800]
- * [14, 87178291200.0, 87178291200]
- * [15, 1307674368000.0, 1307674368000]
- * [16, 20922789888000.0, 20922789888000]
- * [17, 355687428096000.0, 355687428096000]
- * [18, 6.402373705728e+15, 6402373705728000]
- * [19, 1.21645100408832e+17, 121645100408832000]
- * [20, 2.43290200817664e+18, 2432902008176640000]
- * [21, 5.109094217170944e+19, 51090942171709440000]
- * [22, 1.1240007277776077e+21, 1124000727777607680000]
- * [23, 2.5852016738885062e+22, 25852016738884976640000]
- * [24, 6.204484017332391e+23, 620448401733239439360000]
- * [25, 1.5511210043330954e+25, 15511210043330985984000000]
+ * 1.upto(26) {|i| p [i, Math.gamma(i), fact(i-1)] }
+ * #=> [1, 1.0, 1]
+ * # [2, 1.0, 1]
+ * # [3, 2.0, 2]
+ * # [4, 6.0, 6]
+ * # [5, 24.0, 24]
+ * # [6, 120.0, 120]
+ * # [7, 720.0, 720]
+ * # [8, 5040.0, 5040]
+ * # [9, 40320.0, 40320]
+ * # [10, 362880.0, 362880]
+ * # [11, 3628800.0, 3628800]
+ * # [12, 39916800.0, 39916800]
+ * # [13, 479001600.0, 479001600]
+ * # [14, 6227020800.0, 6227020800]
+ * # [15, 87178291200.0, 87178291200]
+ * # [16, 1307674368000.0, 1307674368000]
+ * # [17, 20922789888000.0, 20922789888000]
+ * # [18, 355687428096000.0, 355687428096000]
+ * # [19, 6.402373705728e+15, 6402373705728000]
+ * # [20, 1.21645100408832e+17, 121645100408832000]
+ * # [21, 2.43290200817664e+18, 2432902008176640000]
+ * # [22, 5.109094217170944e+19, 51090942171709440000]
+ * # [23, 1.1240007277776077e+21, 1124000727777607680000]
+ * # [24, 2.5852016738885062e+22, 25852016738884976640000]
+ * # [25, 6.204484017332391e+23, 620448401733239439360000]
+ * # [26, 1.5511210043330954e+25, 15511210043330985984000000]
*
*/