Why does my Morse code converter display no output

Question

I want to make a morse code converter that converts letters from a txt file to morse code and morse code from a txt file to letters.

The way of execution is ./morse.sh -e Text.txt for encoding and ./morse.sh -d Morse_text.txt for decoding. My only problem is that the output is not displayed on the screen for some reason.

Here is the code. If I made a mistake let me know.

#!/bin/bash

echo "Hello,welcome to the Morse Code Converter!!"

encode(){
    declare -A morse
    morse[A]=".-";
    morse[B]="-...";
    morse[C]="-.-.";
    morse[D]="-..";
    morse[E]=".";
    morse[F]="..-.";
    morse[G]="--.";
    morse[H]="....";
    morse[I]="..";
    morse[J]=".---";
    morse[K]="-.-";
    morse[L]=".-..";
    morse[M]="--";
    morse[N]="-.";
    morse[O]="---";
    morse[P]=".--.";
    morse[Q]="--.-";
    morse[R]=".-.";
    morse[S]="...";
    morse[T]="-";
    morse[U]="..-";
    morse[V]="...-";
    morse[W]=".--";
    morse[X]="-..-";
    morse[Y]="-.--";
    morse[Z]="--..";
    morse[1]=".----";
    morse[2]="..---";
    morse[3]="...--";
    morse[4]="....-";
    morse[5]=".....";
    morse[6]="-....";
    morse[7]="--...";
    morse[8]="---..";
    morse[9]="----.";
    morse[0]="-----";

    for (( k = 0; k < ${#morse}; k=k + 1 )); do
        echo "${morse}"
    done
}

decode(){
    declare -A letter
    letter[.-]="A";
    letter[-...]="B";
    letter[-.-.]="C";
    letter[-..]="D";
    letter[.]="E";
    letter[..-.]="F";
    letter[--.]="G";
    letter[....]="H";
    letter[..]="I";
    letter[.---]="J";
    letter[-.-]="K";
    letter[.-..]="L";
    letter[--]="M";
    letter[-.]="N";
    letter[---]="O";
    letter[.--.]="P";
    letter[--.-]="Q";
    letter[.-.]="R";
    letter[...]="S";
    letter[-]="T";
    letter[..-]="U";
    letter[...-]="V";
    letter[.--]="W";
    letter[-..-]="X";
    letter[-.--]="Y";
    letter[--..]="Z";
    letter[-----]="0";
    letter[.----]="1";
    letter[..---]="2";
    letter[...--]="3";
    letter[....-]="4";
    letter[.....]="5";
    letter[-....]="6";
    letter[--...]="7";
    letter[---..]="8";
    letter[----.]="9";

    for (( i = 0; i < ${#morse}; i=i + 1 )); do
        echo "${letter:i}"
    done
}

if [[ $1 = "-e" ]]; then
    while IFS= read -r line || [[ -n "$line" ]] ; do
        echo "The text is : $line"
        echo "Morse code is:"
    done < "$2"
    encode "$@"
elif [[ $1 = "-d" ]]; then
    while IFS= read -r line1 || [[ -n "$line1" ]] ; do
        echo "The Morse code is : $line1"
        echo "The translation is:"
    done < "$2"
    decode "$@"
else
    echo "Please try again using -e or -d"
fi