console.clear()

let a
console.log(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 + " OR " + b + "=" + (a || b))

a = new Date()
b = new Date()
b.setDate(a.getDate() - 61)

console.log(a.toLocaleString("en-UK"));
console.log(a.toLocaleDateString("en-UK"));
console.log(b.toLocaleString("en-UK"))
console.log(a.toLocaleDateString("fr-CH"))

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("en-UK") + " est de type " + typeof(d))