Create d4_exercise_control_flow.py

Author: erzixiongdi

19100401/erzixiongdi/d4_exercise_control_flow.py

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+#使用for...in循环打印九九乘法表
+print('for...in循环打印九九乘法表')
+for i in range(1,10):
+    for j in range(1,i+1):
+        print(i,'*',j,'=',i*j,end='\t',sep='')
+    print()
+
+#使用while循环打印九九乘法表
+print('while循环打印九九乘法表')
+i=1
+while i<10:
+    j=1
+    while j<i+1:
+        if i%2==0:
+            break
+        print(i,'*',j,'=',i*j,end='\t',sep='')
+        j+=1
+    print()
+    i+=1