20 lines
599 B
Plaintext
20 lines
599 B
Plaintext
var BN=Import("zklBigNum"), ten2n=BN(10).pow(64);
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fcn u(n){ // use formula to create a fraction of big ints
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const B=-3, Y=4;
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N:=BN(6).pow(n+1)*B + BN(5).pow(n+1)*Y;
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D:=BN(6).pow(n)*B + BN(5).pow(n)*Y;
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tostr(N*ten2n/D,64,32)
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}
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fcn tostr(bn,m,r){ // convert big int (*10^m) to float string with len r remainder, flakey
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str,d:=bn.toString(), str.len()-m;
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if(d<0) String(".","0"*-d,str[0,r]);
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else String(str[0,d],".",str[d,r]);
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}
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println("1st: Convergent series");
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foreach n in (T(3,4,5,6,7,8,20,30,50,100)){
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"n =%3d; %3.20F %s".fmt(n,series[n-1],u(n-1)).println();
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}
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