# import the number pi
import numpy as np
x = np.pi

# format pi
print(str(x))              # 3.141592653589793
print('{:.2f}'.format(x))  # 3.14
print('{:.10f}'.format(x)) # 3.1415926536
print('{:.5e}'.format(x))  # 3.14159e+00
print('{:.3%}'.format(x))  # 314.159%