math.exp(x)

The math.exp() function in lua returns the value of ( e^x ) (where ( e ) is the base of natural logarithms).

Syntax

math.exp(x)

Parameters

• x
  A number.

Return value

A nonnegative number representing ( e^x ), where ( e ) is the base of the natural logarithm.

Description

Because math.exp() is a static function, it is always used as math.exp(), rather than as a method of a lua object. This function is useful for calculations involving exponential growth or decay.

Beware that ( e ) raised to a number very close to 0 will be very close to 1 and may suffer from loss of precision.

Examples

Using math.exp()

print(math.exp(-math.huge))  -- 0
print(math.exp(-1))           -- 0.36787944117144233
print(math.exp(0))            -- 1
print(math.exp(1))            -- 2.718281828459045
print(math.exp(math.huge))    -- Infinity

See also

• math.log()
• math.pow()
• math.sqrt()
• math.abs()