Merge pull request #562 from 1Conan/1conan_prime_numbers_bash

Add prime_numbers (Bash)

Author: t2013anurag

prime_number/bash/prime.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+# Bash implementation of 
+# https://github.com/hacktoberfest17/programming/blob/master/prime_number/c/prime_number.c
+
+
+function isPrime {
+    INPUT=$1
+    COUNTER=3
+    RESULT=true
+    if (( INPUT < 2 )); then
+        RESULT=false
+    elif (( INPUT == 2 )); then
+        RESULT=true
+    elif (( INPUT % 2 == 0 )); then
+        RESULT=false
+    else
+        X=$(echo "sqrt(${INPUT})" | bc)
+        while (( COUNTER <= X )); do
+            if (( INPUT % COUNTER == 0 )); then
+                RESULT=false
+            fi
+            ((COUNTER++))
+        done       
+    fi
+}
+
+isPrime $1
+if [[ "${RESULT}" == "true" ]]; then
+    echo "It's a prime!"
+else
+    echo "It's not a prime!"
+fi