Wu Yuxiong - natural born JAVASCRIPT development of learning: function parameters

<! DOCTYPE HTML > 
< HTML > 
< head > 
< Meta charset = "UTF-. 8" > 
< title > novice tutorial (runoob.com) </ title > 
</ head > 
< body > 

< P > Set default values of . </ P > 
< P ID = "Demo" > </ P > 
< Script > 
function myFunction (X,
     0;
    }    
    return x * y;
}
document.getElementById("demo").innerHTML = myFunction(4);
</script>

</body>
</html>

<! DOCTYPE HTML > 
< HTML > 
< head > 
< Meta charset = "UTF-. 8" > 
< title > novice tutorial (runoob.com) </ title > 
</ head > 
< body > 

< P > Set Default function parameters . </ P > 
< P ID = "Demo" > </ P > 
< Script > 
function myFunction (X, return x * y;
}
document.getElementById("demo").innerHTML = myFunction(4);
</script>

</body>
</html>

<! DOCTYPE HTML > 
< HTML > 
< head > 
< Meta charset = "UTF-. 8" > 
< title > novice tutorial (runoob.com) </ title > 
</ head > 
< body > 

< P > Set default values of . </ P > 
< P ID = "the demo1" > </ P > 
< P ID = "demo2" > </ P > 
<
myFunction (X, Y =  10 ) {
     // if not pass parameters y, the default value is 10 
    return X + Y; 
} 
// Output 2 
document.getElementById ( " the demo1 " ) .innerHTML = myFunction ( 0 , 2 );
 // output 15, the default value of the parameter y 
document.getElementById ( " demo2 " ) .innerHTML = myFunction ( . 5 );
 </ Script > 

</ body > 
</ HTML >

<! DOCTYPE HTML > 
< HTML > 
< head > 
< Meta charset = "UTF-8" > 
< title > newbie tutorial (runoob.com) </ title > 
</ head > 
< body > 

< the p- > Find the maximum number. </ P > 
< P ID = "Demo" > </ P > 
< Script > 
X = FindMax ( . 1 , 123 ,115, 44, 88);
 
function findMax() {
    var i, max = arguments[0];
    
    if(arguments.length < 2) return max;
 
    for (i = 0; i < arguments.length; i++) {
        if (arguments[i] > max) {
            max = arguments[i];
        }
    }
    return max;
}
document.getElementById("demo").innerHTML = x;
</script>

</body>
</html>

<! DOCTYPE HTML > 
< HTML > 
< head > 
< Meta charset = "UTF-. 8" > 
< title > novice tutorial (runoob.com) </ title > 
</ head > 
< body > 

< P > is calculated and the sum of all parameters : </ P > 
< P ID = "Demo" > </ P > 
< Script > 
function sumAll () {
     var I,sum = 0;
    for(i = 0; i < arguments.length; i++) {
        sum += arguments[i];
    }
    return sum;
} 
document.getElementById("demo").innerHTML =
    sumAll(1, 123, 500, 115, 44, 88);
</script>

</body>
</html>