log

log, function

def pure const autodiff log(a: number): number

Returns the natural logarithm of the specified number.

• a: a number.

Example

x = 4.2
y = log(x)
show scalar "" with y // 1.44

Errors

The function log fails when called with a non-positive argument.

’log()’: invalid argument ‘-4.2’.

See also

• exp
• The LN function in Excel.