typescrip let vs const vs var code example
Example: var vs let vs const typescript
let num1:number = 1;
function letDeclaration() {
let num2:number = 2;
if (num2 > num1) {
let num3: number = 3;
num3++;
}
while(num1 < num2) {
let num4: number = 4;
num1++;
}
console.log(num1); //OK
console.log(num2); //OK
console.log(num3); //Compiler Error: Cannot find name 'num3'
console.log(num4); //Compiler Error: Cannot find name 'num4'
}
letDeclaration();