Beginner python essay--Control and looping statements

Python is similar to Java's control and looping statements with if, while, and for statements

If statement

If condition:

An expression

Elif Conditions:

An expression

Else

An expression

While statement

While judging condition:

EXECUTE statement

While judging condition:

EXECUTE statement

Else

EXECUTE statement

The While...else statement is primarily used to determine if a block of code is running, for example if the while condition is false, and the Else statement is executed if the while condition is true;

For statement

Just like Java, you don't have to specify the I type and the initialization of I

For <variable> in <sequence>: <statements>else: <statements> # Simple instance for I in range:    print (i)

Describe the range () function, which is often used

Range (Start,stop,step)

Start is the starting position, stop is the end, step is step, default is 1

>>>list (Range (0, 5)) [0, 5, ten,, 25]>>> list (range (0,, 2)) [0, 2, 4, 6, 8]>>> list ( Range (0, -10,-1)) [0,-1,-2, -3, -4, -5,-6,-7,-8, -9]>>> list (range (1, 0)) []>>>[x * x for x in range (1,10,2)] [1,9,25,49,81]

Using break and continue to control flow in loops

Break is encountered in the loop, the statement can exit the loop in advance

Encounter continue in the loop, skip the current cycle and start the next cycle directly

　

Beginner python essay--Control and looping statements