While Loops Basics



Simple While Loop

# while loops until a condition is met - when x = 10 the condition is no longer met and the while loop stops
# Inistalise counter
i = 0

while i < 10:
    print(i)
    i += 1

0
1
2
3
4
5
6
7
8
9

While Loop To Sum

i = 0
sum = 0

while i < 10:
    sum = sum + i
    i += 1 # update counter
    print("Inside Loop | Sum = ", sum)
print("Outside | Loop Sum = ", sum)

Inside Loop | Sum =  0
Inside Loop | Sum =  1
Inside Loop | Sum =  3
Inside Loop | Sum =  6
Inside Loop | Sum =  10
Inside Loop | Sum =  15
Inside Loop | Sum =  21
Inside Loop | Sum =  28
Inside Loop | Sum =  36
Inside Loop | Sum =  45
Outside | Loop Sum =  45

While loop with condition and nested if statement

# while loops until a condition is met - along with a nested if condition therefore if x is less than 10 and x is less than 5 ends the loop

x = 0

while x < 10:
    if x == 5:
        break
    print(x)
    x += 1

0
1
2
3
4

Infinite Loop example - Commeneted out!

# Infinite Loop - DON'T DO IT!
# x = 0

# while True:
#     print(x)
#     x += 1