2.3. for loops#

2.3.1. Learning goals#

2.3.1.1. For loops in python#

Loops are a common structure in coding/scripting.

for i in range(10):
    print(i)

0
1
2
3
4
5
6
7
8
9

Loops are often used to compute sums. For example if we want to know \(\sum_{i=0}^{10} i\)

partialSum = 0
for i in range(11):
    partialSum += i
    print(i, partialSum)
print("Final sum is:", partialSum)

0 0
1 1
2 3
3 6
4 10
5 15
6 21
7 28
8 36
9 45
10 55
Final sum is: 55

Loops are often used to compute sums. For example if we want to know \(\sum_{i=1}^{10} i\)

partialSum = 0
for i in range(1,11):
    partialSum += i
    print(i, partialSum)
print("Final sum is:", partialSum)

1 1
2 3
3 6
4 10
5 15
6 21
7 28
8 36
9 45
10 55
Final sum is: 55