javascript 2
4760 ワード
:
<script>
function abs(){
var x;
if(x>0){
return x;
}
else{
return -x;
}
}
console.log(abs(-9));// NaN
</script>
:
<script>
function abs(x){
//var x;
if(x>0){
return x;
}
else{
return -x;
}
}
console.log(abs(-9));// 9
</script>
:
<script>
function abs(){
//var x;
if(x>0){
return x;
}
else{
return -x;
}
}
console.log(abs(-9));// ReferenceError: x is not defined if(x>0){
</script>
:
<script>
function abs(){
//var x;
if(x>0){
return x;
}
else{
return -x;
}
}
console.log(x=-9);// -9
</script>
:
<script>
function abs(x){
//var x;
if(x>0){
return x;
}
else{
return -x;
}
}
console.log(x=-9);// -9
</script>
:
<script>
function abs(x){
//var x;
if(x>0){
return x;
}
else{
return -x;
}
}
abs(-9);
console.log(x=-9);// -9
</script>