pi() : Pi Constant

Get the mathematical constant π (pi), approximately 3.14159.

Signature

pi()

Parameters

None.

Returns

Type: Double

The value of π (approximately 3.14159265358979).

Examples

Circle Calculations

<p>Circumference: {{format(2 * pi() * model.radius, '0.00')}}</p>
<p>Area: {{format(pi() * pow(model.radius, 2), '0.00')}}</p>

Data:

doc.Params["model"] = new {
    radius = 5
};

Output:

<p>Circumference: 31.42</p>
<p>Area: 78.54</p>

Angle Conversions

<p>90° = {{format(pi() / 2, '0.000')}} radians</p>
<p>180° = {{format(pi(), '0.000')}} radians</p>
<p>360° = {{format(2 * pi(), '0.000')}} radians</p>

Output:

<p>90° = 1.571 radians</p>
<p>180° = 3.142 radians</p>
<p>360° = 6.283 radians</p>

Trigonometric Calculations

<p>sin(π/6) = {{format(sin(pi() / 6), '0.000')}}</p>
<p>cos(π/3) = {{format(cos(pi() / 3), '0.000')}}</p>

Output:

<p>sin(π/6) = 0.500</p>
<p>cos(π/3) = 0.500</p>

Notes

• Returns constant value (no parameters)
• Value: 3.14159265358979…
• Used in circle, trigonometry, and wave calculations
• More accurate than using 3.14 or 22/7
• For Euler’s number, use e()

See Also

• e Function
• sin Function
• cos Function
• radians Function
• degrees Function