src.c:1:1: error: unknown type name 'def'
def function(a,n):
^
src.c: In function 'function':
src.c:1:18: error: expected declaration specifiers before ':' token
def function(a,n):
^
src.c:8:24: error: empty character constant
number=float(input(''))
^
src.c:9:17: error: empty character constant
n=int(input(''))
^