python - Letters Breaking Code -

in need code,

print("please enter number plate") num_plate = (input()) #asks , stores number plate  print ("please enter distance") dist = (float(input())) #asks , stores distance  print ("please enter speed limit") speed_lim = (float(input())) #asks , stores speed limit  print ("please enter finish time") end = (float(input())) #asks , stores end time 

whenever input letters comes error:

traceback (most recent call last):   file "\average speed camera code.py", line 17, in <module>     dist = (float(input())) valueerror: not convert string float: 'fg' 

i think you're getting @ you'd rather code didn't crash on invalid input? you'll need error handling. if want force valid input like:

print ("please enter distance") while true:     try:         dist = (float(input()))         break     except valueerror:         print("please enter valid input!") 

if feeling flash wrap in re-usable function reduce repetition other calls.