console.log();
let a ;
a = 15;
console.log("Ma variable a = "+a);
let b = 9;
console.log("Ma variable b = "+b);
console.log(a+"+"+b+"="+(a+b));
console.log(a+"-"+b+"="+(a-b));
console.log(a+"*"+b+"="+(a*b));
console.log(a+"/"+b+"="+(a/b));
a="Bonjour";
b="les amis";
console.log(a+" "+b);
a=true;
b=false;
console.log(a+" AND "+b+"="+(a && b));
console.log(a+" AND "+b+"="+(a || b));
a = new Date();
b = new Date();
b.setDate(a.getDate() -61);
console.log(a.toLocaleString());
console.log(a.toLocaleDateString());
console.log(b.toLocaleString());
console.log(b.toLocaleDateString());
a = Math.PI;
b="bonjour";
let c = true;
let d = new Date();
console.log(a+" est de type "+typeof a);
console.log(b+" est de type "+typeof b);
console.log(c+" est de type "+typeof c);
console.log(d.toLocaleDateString()+" est de type "+typeof d);