- it技术
- day4作业二
function mean(a
,b
,c
){
return (a
+b
+c
)/3
}
let a
=mean(1,2,3)
console
.log(a
)
function mean1(){
sum
=0;
for(let i
=0;i
<arguments
.length
;i
++){
sum
=sum
+arguments
[i
]
}
return sum
/arguments
.length
}
let a
=mean1(1,2,3,4)
console
.log(a
)
function mean2(num
){
const sum
=num
.reduce((sum
,curVal
)=>sum
+curVal
)/num
.length
;
return sum
;
}
let a
=mean2([1,2,3,4])
console
.log(a
)
const arr
=[1,2,3,4,24];
const arr1
=arr
.map(
(x
)=>{
if(x
%2==0){
return x
;
}
}
);
const arr2
=[];
arr1
.forEach(
item
=>{
if(item
){
arr2
.push(item
)
}
}
)
function mean3(num
){
const sum
=num
.reduce((sum
,curVal
)=>sum
+curVal
)/num
.length
;
return sum
;
}
let a
=mean3(arr2
);
console
.log(a
)
