SAGE Workshop 1.sagews

%md <div align='center'><strong> <font size=5>SAGE WORKSHOP 1</font></strong></div>

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# Example 1. Write a loop to computes powers of 2#
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a = 1
for x in range(10):
    a = pow(2, x)
    print("2 to the power %d is %d" % (x, a))

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# Example 2. Write a while loop that prints the integers from 1 to 100 #
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print ('printing integers from 1 to 100')
a = 1
while a <= 100:
    print(a)
    a = a +1


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# Example 3. Write a loop that counts backwards by threes from 12 to -9 #
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a = 12
while a >= -9:
    print (a)
    a = a-3

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# Example 4. Write a loop that computes the first ten prime numbers #
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number = 1
count = 0
while count < 10:
    if is_prime(number):
        count = count +1
        print ("prime %d" % (number))
    number = number + 1;

2 to the power 0 is 1 2 to the power 1 is 2 2 to the power 2 is 4 2 to the power 3 is 8 2 to the power 4 is 16 2 to the power 5 is 32 2 to the power 6 is 64 2 to the power 7 is 128 2 to the power 8 is 256 2 to the power 9 is 512 printing integers from 1 to 100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 12 9 6 3 0 -3 -6 -9 prime 2 prime 3 prime 5 prime 7 prime 11 prime 13 prime 17 prime 19 prime 23 prime 29

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# Example 5. Create a list of all the numbers between 1 and 1000 that are multiples of 3 or/and 5 #
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for i in range(1, 1001):
    if i%5 ==0  and i%3 ==0:
        print("multiples of 3 and 5: %d" % (i))

print("----------------------NEXT---------------------")
for i in range(1, 1001):
    if i%5 ==0 or i%3 ==0:
        print("multiples of 3 or 5: %d" % (i))

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# Example 6. Write a loop that finds all the odd numbers up to 100 that are multiple of 3 or 5  #
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for i in range(3,101):
    if i % 2 == 2:
        continue
    else:
        divisors_list = divisors(i)
        if 5 in divisors_list and 3 in divisors_list:
            print("multiples of 3 and 5:  %d" % (i))
        if 5 in divisors_list or 3 in divisors_list:
            print("multiples of 3 or 5:  %d" % (i))

multiples of 3 or 5: 3 multiples of 3 or 5: 5 multiples of 3 or 5: 6 multiples of 3 or 5: 9 multiples of 3 or 5: 10 multiples of 3 or 5: 12 multiples of 3 and 5: 15 multiples of 3 or 5: 15 multiples of 3 or 5: 18 multiples of 3 or 5: 20 multiples of 3 or 5: 21 multiples of 3 or 5: 24 multiples of 3 or 5: 25 multiples of 3 or 5: 27 multiples of 3 and 5: 30 multiples of 3 or 5: 30 multiples of 3 or 5: 33 multiples of 3 or 5: 35 multiples of 3 or 5: 36 multiples of 3 or 5: 39 multiples of 3 or 5: 40 multiples of 3 or 5: 42 multiples of 3 and 5: 45 multiples of 3 or 5: 45 multiples of 3 or 5: 48 multiples of 3 or 5: 50 multiples of 3 or 5: 51 multiples of 3 or 5: 54 multiples of 3 or 5: 55 multiples of 3 or 5: 57 multiples of 3 and 5: 60 multiples of 3 or 5: 60 multiples of 3 or 5: 63 multiples of 3 or 5: 65 multiples of 3 or 5: 66 multiples of 3 or 5: 69 multiples of 3 or 5: 70 multiples of 3 or 5: 72 multiples of 3 and 5: 75 multiples of 3 or 5: 75 multiples of 3 or 5: 78 multiples of 3 or 5: 80 multiples of 3 or 5: 81 multiples of 3 or 5: 84 multiples of 3 or 5: 85 multiples of 3 or 5: 87 multiples of 3 and 5: 90 multiples of 3 or 5: 90 multiples of 3 or 5: 93 multiples of 3 or 5: 95 multiples of 3 or 5: 96 multiples of 3 or 5: 99 multiples of 3 or 5: 100