Struct Log10Fn 

pub struct Log10Fn;

Trait Implementations

impl Debug for Log10Fn

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Function for Log10Fn

Returns the base-10 logarithm of a positive number.

Remarks

• number must be greater than 0; otherwise the function returns #NUM!.
• LOG10(POWER(10,x)) returns x up to floating-point precision.
• Input errors are propagated.

Examples

title: "Power of ten to exponent"
formula: "=LOG10(1000)"
expected: 3

title: "Log base 10 of a decimal"
formula: "=LOG10(0.01)"
expected: -2

related:
  - LOG
  - LN
  - EXP
faq:
  - q: "When does LOG10 return #NUM!?"
    a: "It returns #NUM! for non-positive input values."

[formualizer-docgen:schema:start] Name: LOG10 Type: Log10Fn Min args: 1 Max args: 1 Variadic: false Signature: LOG10(arg1: number@scalar) Arg schema: arg1{kinds=number,required=true,shape=scalar,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false} Caps: PURE [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

fn name(&self) -> &'static str

fn min_args(&self) -> usize

fn arg_schema(&self) -> &'static [ArgSchema]

fn eval<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], _: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

The unified evaluation path.

fn namespace(&self) -> &'static str

fn variadic(&self) -> bool

fn volatile(&self) -> bool

fn aliases(&self) -> &'static [&'static str]

Optional list of additional alias names (case-insensitive) that should resolve to this function. Default: empty slice. Implementors can override to expose legacy names. Returned slice must have ’static lifetime (typically a static array reference).

fn function_salt(&self) -> u64

fn eval_reference<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Option<Result<ReferenceType, ExcelError>>

Optional reference result path. Only called by the interpreter/engine when the callsite expects a reference (e.g., range combinators, by-ref argument positions, or spill sources).

fn dispatch<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

Dispatch to the unified evaluation path with automatic argument validation.