I'm trying to calculate a field based on the values of others in the same layer in a calculation. I can't work out why its not working. I've even cut everything down to just be based on one field and even that won't work, so frustrating!

This is based on one field

```
rows = arcpy.UpdateCursor(inputFC)
for row in rows:
    val = row.getValue(Infield1)
    row.setValue(outfld , val)
    rows.updateRow(row)
    del rows, row
    arcpy.AddMessage("Completed")

```

this is the final script. Its meant to calculate calories based on minutes, speed and weight (weight as a number you input rather than a field)
import sys, arcpy, math

```
inputFC = arcpy.GetParameterAsText(0)      # Input feature class
timeField = arcpy.GetParameterAsText(1)      # Input time in minutes
speedField = arcpy.GetParameterAsText(2)      # Input speed
SlopeField = arcpy.GetParameterAsText(3)      # Input Slope
weight = float(arcpy.GetParameterAsText(4))      #input weight in kg

arcpy.AddField_management(inputFC, 'Calories', 'LONG') #create calorie field
rows = arcpy.UpdateCursor(inputFC)
for row in rows:
    time = row.getValue(timeField)
    speed = row.getValue(speedField)
    slope = row.getValue(SlopeField)
    calories = time * (speed * 3.5 * weight)/200 * slope
    row.setValue('Calories', calories)
    rows.updateRow(row)
    del row, rows

```

this says completed but the calories field ends up being null