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Let us estimate the value of Pi.
Throw 100 darts at 1x1 square with 1/4 of unit circle in it. Count hits outside the circle:
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
3
.
0
[1]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
4
.
0
[2]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
4
.
0
[3]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
4
.
0
[4]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
5
.
0
[5]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
6
.
0
[6]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
6
.
0
[7]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
8
.
0
[8]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
9
.
0
[9]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
11
.
0
[10]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
12
.
0
[11]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
14
.
0
[12]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
15
.
0
[13]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
18
.
0
[14]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
19
.
0
[15]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
19
.
0
[16]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
19
.
0
[17]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
20
.
0
[18]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
22
.
0
[19]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
23
.
0
[20]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
23
.
0
[21]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
24
.
0
[22]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
25
.
0
[23]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
25
.
0
[24]
ans
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
+
int
(
rand
*
*
2
+
rand
*
*
2
)
=
26
.
0
[25]
4
*
(
1
-
ans
/
100
)
=
2
.
96
[26]
Now hit the reload button of your browser repeatedly.
You should see the value of expression [26] fluctuate around 3.14.
CalculatorPi.com
1
2
3
+
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asin
(
)
4
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6
−
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cos
acos
exp
←
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8
9
×
g
tan
atan
ln
,
•
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∕
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log(a,b)
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√
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CLR
Batch edit
Let us estimate the value of Pi. Throw 100 darts at 1x1 square with 1/4 of unit circle in it. Count hits outside the circle: int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) ans + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) + int(rand**2 + rand**2) 4 * (1 - ans / 100) Now hit the reload button of your browser repeatedly. You should see the value of expression [26] fluctuate around 3.14.
This month's formula: basic two vector operations.
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Batch edit