Piprimes: Difference between revisions
→{{header|ALGOL 68}}
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18 18 18 18 18 18 19 19 19 19
20 20 21 21 21 21 21 21
</pre>
=={{header|AWK}}==
<lang AWK>
# syntax: GAWK -f PIPRIMES.AWK
# converted from FreeBASIC
BEGIN {
while (1) {
if (is_prime(++curr)) {
running++
}
if (running == 22) {
break
}
printf("%3d%1s",running,++count%10?"":"\n")
}
printf("\nPiPrimes 1-%d: %d\n",running,count)
exit(0)
}
function is_prime(x, i) {
if (x <= 1) {
return(0)
}
for (i=2; i<=int(sqrt(x)); i++) {
if (x % i == 0) {
return(0)
}
}
return(1)
}
</lang>
{{out}}
<pre>
0 1 2 2 3 3 4 4 4 4
5 5 6 6 6 6 7 7 8 8
8 8 9 9 9 9 9 9 10 10
11 11 11 11 11 11 12 12 12 12
13 13 14 14 14 14 15 15 15 15
15 15 16 16 16 16 16 16 17 17
18 18 18 18 18 18 19 19 19 19
20 20 21 21 21 21 21 21
PiPrimes 1-22: 78
</pre>
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