\`\`\`
let a = 2;
let b = 5;
//先将a=2与a=5相加然后赋值给a
a += b ;
//结果为a=7
console.log(\`a的值为\${a}\`);
//同样可使用
//先将a=2与a=5相乘然后赋值给a
a=2;
b=5;
a \*= b;
//结果为a=10
console.log(\`a的值为\${a}\`);
//先将a=2与a=5相除然后赋值给a
a=2;
b=5;
a /= b;
//结果为a=0.4
console.log(\`a的值为\${a}\`);
a=2;
b=5;
//先将a=2与a=5详见减除然后赋值给a
a -= b;
//结果为a=-3
console.log(\`a的值为\${a}\`);
\`\`\`
+= 加法运算或连接操作并赋值 a += b a = a + b
-= 减法运算并赋值 a -= b a= a - b
\*= 乘法运算并赋值 a \*= b a = a \* b
/= 除法运算并赋值 a /= b a = a / b
%= 取模运算并赋值 a %= b a = a % b
<<= 左移位运算并赋值 a <<= b a = a << b
> > = 右移位运算并赋值 a >>= b a = a >> b
> > > = 无符号右移位运算并赋值位 a >>>= b a = a >>> b
&= 位与运算并赋值 a &= b a = a & b
|= 位或运算并赋值 a |= b a = a |= b
^= 位异或运算并赋值 a ^= b a = a ^ b
