Insert 'import arcpy' at the top of your code (NameError: name 'arcpy' is not defined)
No indentation needed after the import statements
Check out the ArcGIS Spatial Analyst extension license using 'arcpy.CheckOutExtension("Spatial")' (RuntimeError: ERROR 000824: The tool is not licensed.)
Assuming that 'arcpy.workspace="C:/Users/Vaio/.../Monthly_Original.gdb"' is not the actual directory path run in the code, but merely abbreviated for posting here - you still need to state arcpy.env.workspace
'ListRasters(p)' needs to have the variable 'p' previously defined (NameError: name 'p' is not defined)
'range()' expects atleast one argument - or try something like for 'k in rasterlist:' (TypeError: range expected at least 1 arguments, got 0)
This is the reason for the invalid syntax error: 'OutRaster=(Raster(rasterlist[k])/100' has two opening parentheses but only one closing parenthesis
Do not use '.Name' for assigning the output name (AttributeError: 'Raster' object has no attribute 'Name') Note: (lower case) '.name' is Read Only
What are the '*' in 'p_2000_*.*' supposed to mean? If you want variables then you may need a counter variable defined, or extract the original file name from the item used in the for loop with rasterlist to replace the first '*' (perhaps the second '*' could be replaced with the text for the desired output raster file extension). The '*' characters used in the output name will cause more errors. (RuntimeError: ERROR 010093: Output raster format UNKNOWN is unsupported.)
The very last line needs to be changed from 'OutTaster' to 'OutRaster' (NameError: name 'OutTaster' is not defined)
The '.save' cannot be capitalized (AttributeError: 'Raster' object has no attribute 'Save')
EDIT: Now that I finally have access to the software I was able to revise your code - you may need to modify to suit your actual data (see comments and online help):
import arcpy
from arcpy.sa import *
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Set the workspace environment
arcpy.env.workspace="C:/Users/Vaio/FULLPATHNAME/Monthly_Original.gdb"
# Create a list of raster files
rasterlist = arcpy.ListRasters()
# Loop through the actual list of rasters generated by ListRasters()
for k in rasterlist:
print k # Optional visual check of file name
# Divide each existing raster by 100
OutRaster = Raster(k) / 100
# Specify the output name variable - modify as needed
# This example adds prefix 'p_' to original file name with extension included
OutRaster_Name = 'p_' + k
# Save the output raster
OutRaster.save(OutRaster_Name)
