Struct NetworkdaysIntlFn 

pub struct NetworkdaysIntlFn;

Returns the number of working days between two dates with configurable weekends.

Remarks

• The weekend argument can be a number code (1-7, 11-17) or a 7-character string of 0s and 1s (Mon-Sun, 1 = weekend day). Default is 1 (Sat/Sun).
• The optional holidays argument accepts a range or array of date serials to exclude.
• If start_date > end_date, the result is negative.
• A weekend string of all 1s (no workdays) returns #VALUE!.

Examples

=NETWORKDAYS.INTL(DATE(2024,1,1), DATE(2024,1,31))

title: "Default weekends (same as NETWORKDAYS)"
formula: "=NETWORKDAYS.INTL(DATE(2024,1,1), DATE(2024,1,31))"
expected: 23

title: "Friday-only weekend"
formula: "=NETWORKDAYS.INTL(DATE(2024,1,1), DATE(2024,1,7), 16)"
expected: 6

title: "Custom weekend string (Mon+Fri off)"
formula: "=NETWORKDAYS.INTL(DATE(2024,1,1), DATE(2024,1,7), \"1000100\")"
expected: 5

related:
  - NETWORKDAYS
  - WORKDAY.INTL
  - WEEKDAY
faq:
  - q: "What happens if the weekend string is all 1s?"
    a: "NETWORKDAYS.INTL returns #VALUE! because there would be no workdays."

Trait Implementations

impl Debug for NetworkdaysIntlFn

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

Formats the value using the given formatter.

impl Function for NetworkdaysIntlFn

[formualizer-docgen:schema:start] Name: NETWORKDAYS.INTL Type: NetworkdaysIntlFn Min args: 2 Max args: variadic Variadic: true Signature: NETWORKDAYS.INTL(arg1: number@scalar, arg2: number@scalar, arg3: any@scalar, arg4…: any@scalar) Arg schema: arg1{kinds=number,required=true,shape=scalar,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false}; arg2{kinds=number,required=true,shape=scalar,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false}; arg3{kinds=any,required=true,shape=scalar,by_ref=false,coercion=None,max=None,repeating=None,default=false}; arg4{kinds=any,required=true,shape=scalar,by_ref=false,coercion=None,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 variadic(&self) -> bool

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

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

The unified evaluation path.

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

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 dependency_contract( &self, _arity: usize, ) -> Option<FunctionDependencyContract>

Optional dependency contract for passive planning/FormulaPlane analysis.

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.