bash: add fib function

1 files changed, 27 insertions, 0 deletions

diff --git a/entries/meghasinghania22/bash/script.sh b/entries/meghasinghania22/bash/script.sh
new file mode 100644
index 0000000..0cbba4d
--- /dev/null
+++ b/entries/meghasinghania22/bash/script.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+int_regex='^[0-9]+$'
+function fib(){
+    if [ "$1" -le 1 ]; then
+        echo $1
+    else
+        echo $[`fib $[$1 - 1]` + `fib $[$1 - 2]` ]
+    fi
+}
+
+function main(){
+    echo -n "Enter a whole number: "
+    read num
+
+    if [ -z "$num" ]; then
+        echo "Uh oh! Argument required!"
+    elif ! [[ "$num" =~ $int_regex ]]; then
+        echo "Uh oh! Argument must be a number :|"
+    elif [ "$num" -lt 0 ]; then
+        echo "Uh oh! Argument must be a whole number :|"
+    else
+        fib $num
+    fi
+
+}
+
+main
\ No newline at end of file