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# Can someone help me I always get TypeError:Can't multiply sequence by non-int of type 'str'

Member

I am still new at python and I can't seem to get my code right. I was trying to have a FCFS that can calculate the waiting time and turn around time

```def findWaitingTime(processes, n, bt, wt, at):
service_time = [0] * n
service_time[0] = 0
wt[0] = 0

for i in range(1, n):
service_time[i] = (service_time[i - 1] + bt[i - 1])

wt[i] = service_time[i] - at[i]
if (wt[i] < 0):
wt[i] = 0

def findTurnAroundTime(processes, n, bt, wt, tat):
for i in range(n):
tat[i] = bt[i] + wt[i]

def findavgTime(processes, n, bt, at):
wt = [0] * n
tat = [0] * n

findWaitingTime(processes, n, bt, wt, at)
findTurnAroundTime(processes, n, bt, wt, tat)

print("Processes Burst Time Arrival Time     Waiting",
"Time Turn-Around Time Completion Time \n")
total_wt = 0
total_tat = 0

for i in range(n):
total_wt = total_wt + wt[i]
total_tat = total_tat + tat[i]
compl_time = tat[i] + at[i]
print(" ", i + 1, "\t\t", bt[i], "\t\t", at[i],
"\t\t", wt[i], "\t\t ", tat[i], "\t\t ", compl_time)

print("Average waiting time = %.5f "%(total_wt /n))
print("\nAverage turn around time = ", total_tat / n)
```

This is my main code where the user will input all the values:

```if __name__ =="__main__":

n = int(input('Enter the total numbers of processes: '))

for i in range(n):
processes = input('Enter the processes: ')

for i in range(n):
burst_time = (int(input('Enter the burst time: ')))

for i in range(n):
arrival_time = (int(input('Enter the arrival time: ')))

findavgTime(n, processes, burst_time,arrival_time)
```