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Fun with integers

1000000000 plus 200000000 is 1200000000
2000000000 plus 200000000 is -2094967296

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Fun with long integers

7000000000000000000 plus 2000000000000000000 is 9000000000000000000
8000000000000000000 plus 2000000000000000000 is -8446744073709551616

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Fun with single-precision floating-point

1.0E7 plus 1 is 1.0000001E7
2.0E7 plus 1 is 2.0E7

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Fun with double-precision floating-point

1.0E15 plus 1 is 1.000000000000001E15
1.0E16 plus 1 is 1.0E16