Created
November 17, 2011 13:52
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Ruby - print multiplication chart
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# Prints out a multiplication chart | |
# whipped this to show my 8 year old daughter how cool programming is... | |
# 1 2 3 4 5 6 7 8 9 | |
# --------------------------------------------- | |
# 1 | 1 2 3 4 5 6 7 8 9 | |
# 2 | 2 4 6 8 10 12 14 16 18 | |
# 3 | 3 6 9 12 15 18 21 24 27 | |
# 4 | 4 8 12 16 20 24 28 32 36 | |
# 5 | 5 10 15 20 25 30 35 40 45 | |
# 6 | 6 12 18 24 30 36 42 48 54 | |
# 7 | 7 14 21 28 35 42 49 56 63 | |
# 8 | 8 16 24 32 40 48 56 64 72 | |
# 9 | 9 18 27 36 45 54 63 72 81 | |
def print_header(l) | |
print " " | |
(1...l).each {|i| print "%5s" % i } | |
print "\n " | |
(1...l).each {|i| print "-----"} | |
end | |
upper_limit = 10 | |
print_header(upper_limit) | |
(1...upper_limit).each do |i| | |
print "\n%5s |" % i | |
(1...upper_limit).each do |j| | |
print "%5s" % (i*j) | |
end | |
end |
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