# For Loops

Narrated by Saumya Jain

# Introduction

• In the prior chapter we earned about "if" statements
• In this chapter we learn how to loop
• Our program can run the same block of code over and over
• This chapter covers "for" loops
• Loop a certain number of times, or for each item in a list
• Next chapter covers "while" loops
• Loop until something happens or a condition is false

# Introduction to Looping

## For Loops

Loop a certain number of times, or for each item in a list.

## While Loops

Loop until something happens.

for student in student_list:
while not closed:

# Keep a Running Total

s=\sum\limits_{n=1}^{100}n
s=1+2+3+4+5 \ldots 98+99+100

By Paul Craven

• 100