JS数组练习

		let sum = 0
        let ave = 0
        let a = [2,6,1,7,4]
        for(i = 0 ; i < 5 ; i ++ ) {
            sum += a[i]
        }
        ave = sum / 5
        document.write(sum+'<br>')
        document.write(ave)

		let a = [2,6,1,77,52,25,7,0,77]
        let max = 0
        let min = Number.MAX_VALUE
        for(i = 0; i < a.length ; i ++ ) {
            if(a[i] >= max){
                max = a[i]
            }
            else if(a[i] <= min) {
                min = a[i]
            }
        }
        document.write(max + '<br>' + min)

let a = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7]
        let newArray = []
        for(i = 0;i < a.length ; i ++ ) {
            if(a[i] >= 10 ) {
                newArray.push(a[i])
            }
        }
        document.write(newArray)

let a = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7]
        let newArray = []
        for(i = 0;i < a.length ; i ++ ) {
            if(a[i] != 0 ) {
                newArray.push(a[i])
            }
        }
        document.write(newArray)