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Introduction#

Control statement categories:

1. Sequential structure
2. Branching structure
3. Loop structure
   

Branching Structure#

if branch#

Single branch#

Basic syntax
if condition {
logic code
}
^{The logic code in {} is only executed when the condition expression is true}

1. () can be added on both sides of the condition expression, but it is recommended not to add them.
2. There must be a space between If and the condition expression.
3. {} must be present.

Result:

Double branch#

Basic syntax
if condition {
logic code 1
} else {
logic code 2
}
^{When the condition expression is true, execute logic code 1; otherwise, execute logic code 2}

Result:

Multiple branches#

Basic syntax
if condition {
logic code 1
} else {
logic code 2
}
......
else {
logic code n
}
^{Execute in order. When one condition expression is true, execute the corresponding logic code and end the execution without continuing to execute}

Result:

switch branch#

Basic syntax
switch expression {
case value 1, value 2, ......:
statement block 1
Case value 3, value 4, ......:
statement block 2
......
default:
statement block
}
^{Execute in order. When one case satisfies the expression, execute the corresponding statement block and end the execution without continuing to execute}

Result:

Loop Structure#

for loop#

Basic syntax
for (initial expression; boolean expression; iteration factor){
loop body;
}

for range#

Can traverse arrays, slices, strings, maps, and channels

Basic syntax
for key, val := range coll {

}

Result:

Keywords#

break#

^{Execute the current loop and then exit the entire loop}

Result:

continue#

^{Exit the current loop and continue with the next loop}

Result:

goto#

^{Jump to the specified line and execute}

Result:

return#

^{End the current function without continuing to execute}

Result: