for循环
for循环
表达式
package com.struct;
//for
public class ForDemo {
public static void main(String[] args) {
//计算1-100的奇数和,偶数和
int evensum = 0;
int oddsum = 0;
//for(初始,条件判断,迭代){}
for (int i = 0; i <= 100; i++) {
if (i % 2 == 0) {
evensum = evensum + i;
} else {
oddsum = oddsum + i;
}
}
System.out.println("偶数和" + evensum);
System.out.println("基数和" + oddsum);
//用while或for循环输出1-1000之间能被5整除的数,并且每行输出3个
// printLn输出完会换行
// print输出完不会换行
for (int i = 0; i <= 1000; i++) {
if (i % 5 == 0) {
System.out.print(i + "\t");
if (i % 15 == 0) {
System.out.print("\n");
}
}
}
}
}
乘法口诀
//99乘法口诀
public class FoeDemo02 {
public static void main(String[] args) {
for (int x = 1; x <= 9; x++) {
for (int y = 1; y <= x; y++) {
System.out.print(x + "*" + y + "=" + (x * y) + "\t");
}
System.out.println();
}
}
}