Primes whose first and last number is 3: Difference between revisions

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 <br><br>
+=={{header|Go}}==
+{{libheader|Go-rcu}}
+<lang go>package main
+import (
+    "fmt"
+    "rcu"
+)
+func main() {
+    var primes []int
+    candidates := []int{3, 33}
+    for i := 303; i <= 393; i += 10 {
+        candidates = append(candidates, i)
+    }
+    for i := 3003; i <= 3993; i += 10 {
+        candidates = append(candidates, i)
+    }
+    for _, cand := range candidates {
+        if rcu.IsPrime(cand) {
+            primes = append(primes, cand)
+        }
+    }
+    fmt.Println("Primes under 4,000 which begin and end in 3:")
+    for i, p := range primes {
+        fmt.Printf("%5s ", rcu.Commatize(p))
+        if (i+1)%11 == 0 {
+            fmt.Println()
+        }
+    }
+    fmt.Println("\nFound", len(primes), "Such primes.")
+}</lang>
+{{out}}
+<pre>
+Primes under 4,000 which begin and end in 3:
+313   353   373   383 3,023 3,083 3,163 3,203 3,253 3,313
+,323 3,343 3,373 3,413 3,433 3,463 3,533 3,583 3,593 3,613 3,623
+,643 3,673 3,733 3,793 3,803 3,823 3,833 3,853 3,863 3,923 3,943
+Found 33 Such primes.
+</pre>
 =={{header|Ring}}==