Var and Let

Difference between Var and Let 

Take a Example :-


var senti=10;
if (senti == 10)
{ var senti =20;
console.log("cond block var check",senti);
}
console.log("outside conditional",senti);


Output:-

cond block var check 20
outside conditional 20

var senti=10;
if (senti == 10)
{ let senti =20;
console.log("cond block var check",senti);
}
console.log("outside conditional",senti);

Output:-

cond block var check 20
outside  conditional 10