Javascript tutorial 2

JS_tutorial_1答案

复习lecture内容

condition

if/else

if (condition) {}
else if (condition){}
else {}

三目运算符

condition?expression1:expression2

Logical operator

a && b
a || b

循环

for循环

for (let i=1; i<=100; i++){
    // expression
}

while循环

let i = 1;
while (i<100){
    // expression
    i++;
}

String方法