1.1
if (...)
{
...
}
else
{
...
}
<!DOCTYPE html><html><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><body><script charset = "utf-8">function myfunction(){ ???var x = 11; ???var y = x % 2; ???document.write(y + "<br>"); ???if (x % 2 == 1){ ???????document.write("单数"); ???} ???else ???{ ???????document.write("双数"); ???}}myfunction();</script></body></html>1.2
if (条件1)
{
...
}
else if (条件2)
{
...
}
else
{
...
}
<!DOCTYPE html><html><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><body><script charset = "utf-8">function myfunction(x){ ???var y = x % 2; ???if (x % 2 == 0){ ???????document.write("双数"); ???} ???else if (x > 10) ???{ ???????document.write("大于10的单数"); ???} ???else ???{ ???????document.write("普通单数"); ???} ???????document.write("<br>"); ???document.write(x);}myfunction(15);</script></body></html>js 学习之路6： if...else...条件语句的使用
原文地址：https://www.cnblogs.com/zrmw/p/10329903.html