# Programming Fundamentals/Loop Examples Python

## Counting

```# This program demonstrates While, Do, and For loop counting using
# user-designated start, stop, and increment values.
#
# References:
#     https://en.wikibooks.org/wiki/Python_Programming

def get_value(name):
print("Enter " + name + " value:")
value = int(input())
return value

def while_loop(start, stop, increment):
print("While loop counting from " + str(start) + " to " +
str(stop) + " by " + str(increment) + ":")
count = start
while count <= stop:
print(count)
count = count + increment

def do_loop(start, stop, increment):
print("Do loop counting from " + str(start) + " to " +
str(stop) + " by " + str(increment) + ":")
count = start
while True:    #This simulates a Do Loop
print(count)
count = count + increment
if not(count <= stop): break   #Exit loop

def for_loop(start, stop, increment):
print("For loop counting from " + str(start) + " to " +
str(stop) + " by " + str(increment) + ":")
for count in range(start, stop + increment, increment):
print(count)

def main():
start = get_value("starting")
stop = get_value("ending")
increment = get_value("increment")
while_loop(start, stop, increment)
do_loop(start, stop, increment)
for_loop(start, stop, increment)

main()
```

### Output

```Enter starting value:
1
Enter ending value:
3
Enter increment value:
1
While loop counting from 1 to 3 by 1:
1
2
3
Do loop counting from 1 to 3 by 1:
1
2
3
For loop counting from 1 to 3 by 1:
1
2
3
```