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4 basic if-else statement patterns
source link: https://yourbasic.org/golang/if-else-statement/
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4 basic if-else statement patterns
yourbasic.org/golang
Basic syntax
if x > max {
x = max
}if x <= y {
min = x
} else {
min = y
}An if statement executes one of two branches according to a boolean expression.
- If the expression evaluates to true, the if branch is executed,
- otherwise, if present, the else branch is executed.
With init statement
if x := f(); x <= y {
return x
}The expression may be preceded by a simple statement,
which executes before the expression is evaluated.
The scope of x is limited to the if statement.
Nested if statements
if x := f(); x < y {
return x
} else if x > z {
return z
} else {
return y
}Complicated conditionals are often best expressed in Go with a switch statement. See 5 switch statement patterns for details.
Ternary ? operator alternatives
You can’t write a short one-line conditional in Go; there is no ternary conditional operator. Instead of
res = expr ? x : y
you write
if expr {
res = x
} else {
res = y
}
In some cases, you may want to create a dedicated function.
func Min(x, y int) int {
if x <= y {
return x
}
return y
}
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