if练习1
<script type="text/javascript">
var score = prompt("请输入小明期末成绩(0-100):");
if(score == 100){
alert("奖励宝马车一辆");
}else if(score >= 80){
alert("奖励iphonex手机一部");
}else if(score >= 60){
alert("参考书");
}else {
alert("什么也没有")
}
</script>
if练习2
<script type="text/javascript">
var height = prompt("请输入你的身高");
var mongy = prompt("请输入你的金钱");
var face = prompt("请输入颜值");
if (height > 180 && mongy >=1000 && face >= 500){
alert("我一定要嫁给他")
}
else if(height <= 180 || mongy<= 1000 || face<=500){
alert("有点不乐意")
}
else {
alert("不嫁")
}
</script>
if练习3
<script type="text/javascript">
var n1 = prompt("请输入数字");
var n2 = prompt("请输入数字");
var n3 = prompt("请输入数字");
//找到3个数中最小的数
if(n1 < n2 && n1 < n3){
if (n2 < n3){
alert(n1 + ',' + n2 +',' + n3);
}else{
alert(n1 + ',' + n3 +',' + n2);
}
}else if(n2 < n1 && n2 < n3){
if (n1 < n3){
alert(n2 + ',' + n3 + ',' +n1);
}
}else {
if (n1 < n2){
alert(n3 + ',' + n1 + ',' +n2);
}else {
alert(n3 + ',' + n2 + ',' +n1);
}
}
</script>
