昨天主要講了嵌套循環,另外還有break爲中斷,打斷 結束當前循環。continue繼續,結束本次循環並且繼續循環
嵌套循環三要素:外打行,內打列,找規律。其中比較經典的程序有打印一個正方形,下面是程序。
public static void main(String[] args) {
for (int i = 1; i <= 5; i++) {
for (int j = 1; j <= 10; j++) {
System.out.print("*");
}
System.out.println();
}
另外還有打印平行四邊形for(int i=1;i<=3;i++){
for (int k = 1; k<=3-i; k++) {
System.out.print(" ");
}
for (int j = 1; j<=5; j++) {
System.out.print("*");
}
System.out.println("");
打印等腰三角形for (int i = 1; i <= 3; i++) {
for (int k = 1; k <= 3 - i; k++) {
System.out.print(" ");
}
for (int j = 1; j <= 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
和打印菱形
for (int i = 1; i <= 3; i++) {
for (int k = 1; k <= 3 - i; k++) {
System.out.print(" ");
}
for (int j = 1; j <= 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
for (int i = 2; i >= 1; i--) {
for (int k = 1; k <= 3 - i; k++) {
System.out.print(" ");
}
for (int j = 1; j <= 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
}