10.md

控制流，用Solidity实现插入排序

控制流

solidity的控制流和其他语言类似,主要包含以下几种

1. if-else

function ifElseTest(uint256 _number) public pure returns(bool){
    if(_number == 0){
        return(true);
    }else{
        return(false);
    }
}

2. for循环

function forLoopTest() public pure returns(uint256){
    uint sum = 0;
    for(uint i = 0; i < 10; i++){
        sum += i;
    }
    return(sum);
}

3. while循环

function whileTest() public pure returns(uint256){
    uint sum = 0;
    uint i = 0;
    while(i < 10){
        sum += i;
        i++;
    }
    return(sum);
}

4. do-while循环

function doWhileTest() public pure returns(uint256){
    uint sum = 0;
    uint i = 0;
    do{
        sum += i;
        i++;
    }while(i < 10);
    return(sum);
}

5. 三元运算符:三元运算符是Solidity中唯一一个接受三个操作数的运算符

function ternaryTest(uint256 x, uint256 y) public pure returns(uint256){
    // return the max of x and y
    return x >= y ? x: y; 
}