scala Quick Start series [cycle]

        Benpian scala fast as Title VII series of blog entry, for everyone to bring about cycling related content.
        

        

cycle

        In the scala can be used for and while, but generally recommended for expression, because for more concise expression syntax.

for expression

grammar

Simple cycle

Use for printing digital expression 1-10

step

1. Generate a digital 1-10 (Note: to use the method)
2. for expression traversal, each digital printing

Reference Code 1

Reference code 2 (shorthand)

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Nested loop

Use a for loop, print the following characters

step

1. Use for expression print 3 lines, 5 stars
2. Each print five stars, wrap

Reference Code

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guard

for expression can be added if the judge sentences, the judge if it is called the guards. We can use the expression guard make for more concise.

Syntax

example

Use for expression can print between 1 and 10 numbers divisible by 3

Reference Code

for derivations

• In the future it may be used to derive the formula for generating a new set (a set of data)
• In the for loop, may be used yield表达式构建出一个集合, we have referred to the use of an expression derived for the yield

Examples

Generating a set of 10, 20 ... 100

Reference Code

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while loop

scala while loop and is consistent java

Examples

Digital printing 1-10

Reference Code

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