IF Statement

IF Statement

Python supports the usual logical conditions from mathematics:

• Equals: a == b

• Not Equals: a != b

• Less than: a < b

• Less than or equal to: a <= b

• Greater than: a > b

• Greater than or equal to: a >= b

IF Statement

• if

• if...else

• if...elif...else

IF (單向)

IF...ELSE...(雙向)

IF...ELIF...(多重條件)

IF...ELIF...ELSE(多重條件)

While Loops

​while 條件
執行程式

While Loops

While Loops---break

​結果:
1
2
3

While Loops---break

​結果:
1
2
4
5
6

For Loops(列印lists中的元素)

For Loops(列印字串中的字母)

For Loops(列印字串中的字母)

For Loops(列印數字範圍)

​Note that range(6) is not the values of 0 to 6, but the values 0 to 5.

For Loops(列印數字範圍)

​range(2, 6), which means values from 2 to 6 (but not including 6):

For inner Loops(巢狀回圈)