The Number of Arguments to a Function

Description

When used inside a function body, nargs returns the number of arguments supplied to that function.

Usage

nargs()

See Also

args, formals and sys.call.

Examples

tst <- function(a, b = 3, ...) {nargs()}
tst() # 0
tst(clicketyclack) # 1 (even non-existing)
tst(c1, a2, rr3) # 3

nargs()# not really meaningful