if statement

if...elif...else statement

Trick Question

for loop

for i in iterator:
# statements

• Iterating over a sequence is called a traversal
• Iterable objects are lists, tuples etc.

#Print all numbers from 0 to n.
n = int(input())
for i in range(n + 1):
print(i)

range() function

range(start, stop, step)

#default values
#start = 0
#step = 1

• all values can be positive or negative
• step cannot be zero, and is 1 by default
• generates from <start> value to <stop -1> value
• returns object of class <range>
• when stop > start and step > 0 returns null
• Example

while loop

• used when you don't know how many times you need to iterate

syntax :