No. It is a constant. A variable is something that changes value in certain circumstances; pi always has the same value.
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several equations' answers come out to 3.14 and so on, thats pi
its a 2 lines and a wavy top over the two lines
pi
Pi.
Pi is usually used as 3.14 in math because it originally goes on to infinity. Therefore, using two significant digits (the most popular used significant digit out there), Pi is abreviated to 3.14. The original Pi goes on forever, but is something like this: 3.147938401643257580923756348170125346938463728395647399047683 583057202350254183503827502854030284820472927492947291248...