Handy measurements

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About

In appearing knowledgeable and figuring out problems, it helps to know a few measurements. On this pages I've included what I consider some important stats to know (but many of which I forget).


Important Constants

• Pi: 3.1415927 (Constants: Pi)
• e: 2.7182818 (Constants: e)... base of natural logarithms = lim(0->inf) (1+1/n)^n


Handy Conversions

• 1 mile ~= 1.6 kilometers
• 1 kilogram ~= 2.2 pounds

Useful Computer Science Values

28 = 256 .....(one byte - unsigned int / char)
210 = 1,024 ............... 220 = 1 million ..... 230 = 1 billion (and so on)
216 = 65,536 .....(two bytes - short)
232 = 4,294,967,296 .....(two bytes - int)
264 = 18,446,744,073,709,551,626 (1.8x10^19) .....(four bytes - long)




See Also


Links