#----------------------------------------------------------------------
# Code fragments to illustrate for-loops and list comprehensions
#
# Copyright (C) February 16, 2018 -- Dr. William T. Verts
#----------------------------------------------------------------------

# Explicit list of numeric items
for X in [4,1,9,3,6,2,5]:
    print X

# Explicit list of string items 
for X in ["frog","toad","goat","newt"]:
    print X       

# Explicit list of any data types    
for X in ["frog",7,(3,4,5),5.67,[3,4,1],9]:
    print X

# List generated by range = [1,4,7,10]
for X in range(1,11,3):
    print X
 
# Same as above using while-loop   
X = 1
while (X < 11):
    print X
    X = X + 3
 
# Setup to generate a list of floats       
L = []
for X in range(1,11,3):
    L = L + [4.6 * math.sqrt(X)]    
print L

# Same as above using a list comprehension
L = [4.6 * math.sqrt(X) for X in range(1,11,3)]
print L

# Multiplying corresponding items from two lists (can't use list comprehension)    
L1 = [3,5,1,6,7,2]
L2 = [4,9,6,8,2,3]
L = []
for X in range(len(L1)):
    L = L + [L1[X] * L2[X]]
print L