function toLowerCase(string) {
    let valAscii;
    const table = string.split(""); // make string as an array
    for (let i = 0; i < table.length; i++) {
        if (string.charCodeAt(i) >= 65 && string.charCodeAt(i) <= 90) {
            valAscii = string.charCodeAt(i) + 32; // 32 equal to the difference in between upper and lower cases
            table[i] = String.fromCharCode(valAscii); // return table ascii valor
        }
    }
    return table.join(""); // put back the array as a string
}
console.log(toLowerCase("tHis is an ExaMple of a strING with lower anD UppeRCases"));


// version noob ! //

// const toLowerCase = (string) => {
//    const upperCase = ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',' ']
//    const lowerCase = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',' ']

//    const char = string.split("");

//    const newArray = []

//    for(let i=0 ; i < char.length ; i++){
//        for(let z=0 ; z < upperCase.length ; z++) {
//            if(char[i]=== upperCase[z]){
//                newArray.push(lowerCase[z])
//            } else if (char[i]=== lowerCase[z]){
//                newArray.push(lowerCase[z])
//            }
//        }
//    }
//    const newChar = newArray.join('')
//console.log(newChar)
//}

//toLowerCase("BONJOUR")