function caesar(){ var num = parseInt(document.getElementById("num").value) var txt = document.getElementById("txt").value; var x = []; if(num>=-26 && num<=26){ for(i=0;i=65 && txt.charCodeAt(i)<=90){ if(x[i]>=65&&x[i]<=90){ x[i]=x[i]; } else if(x[i]>90){ x[i]=x[i]-26; } else if(x[i]<65){ x[i]=x[i]+26; } } if(txt.charCodeAt(i)==32){ x[i]=txt.charCodeAt(i); } if(txt.charCodeAt(i)>=97 && txt.charCodeAt(i)<=122){ if(x[i]>=97&&x[i]<=122){ x[i]=x[i]; } else if(x[i]>122){ x[i]=x[i]-26; } else if(x[i]<97){ x[i]=x[i]+26; } } } } else{ document.write("Number must be from -26 to 26, try again :)") } document.write(String.fromCharCode.apply(null, x)) } function decaesar(){ var num = parseInt(document.getElementById("num").value)*-1 var txt = document.getElementById("txt").value; var x = []; if(num>=-26 && num<=26){ for(i=0;i=65 && txt.charCodeAt(i)<=90){ if(x[i]>=65&&x[i]<=90){ x[i]=x[i]; } else if(x[i]>90){ x[i]=x[i]-26; } else if(x[i]<65){ x[i]=x[i]+26; } } if(txt.charCodeAt(i)==32){ x[i]=txt.charCodeAt(i); } if(txt.charCodeAt(i)>=97 && txt.charCodeAt(i)<=122){ if(x[i]>=97&&x[i]<=122){ x[i]=x[i]; } else if(x[i]>122){ x[i]=x[i]-26; } else if(x[i]<97){ x[i]=x[i]+26; } } } } else{ document.write("Number must be from -26 to 26, try again :)") } document.write(String.fromCharCode.apply(null, x)) }

[JS] Caesar Cipher (Encode & Decode)