Solutions for Jupyter notebook on loops

Question 1

n= 1
while n < 11:
  print('no of molecules= {:2d} \t conc (nM)= {:.2f}'.format(n, n/6.0e23/1.0e-15/1.0e-9))
  n += 1

Question 2

data= ['GAL1', 10, 'GAL2', 0.1, 'GAL3', 0.05, 'GAL7', 0.4]
for i in np.arange(0, 8, 2):
  print(data[i], data[i+1])

or using the zip command

for gene, value in zip(data[::2], data[1::2]):
  print(gene, value)

Question 3

s= 0
for i in range(1, 101):
  s += 1/i
print(s)

or using a list comprehension

print(np.sum([1/i for i in range(1, 101)]))

Question 4

x= np.linspace(-np.pi, np.pi, 100)
y= 0
for n in range(1, 11):
  y += 2/n*(-1)**n*np.sin(n*x)
plt.figure()
plt.plot(x, y)
plt.show()