if statement

The if statement judges the evaluation (comparison) result such as a numerical value or a character string. If the evaluation result is "true", the processing in the if block is executed. If the evaluation result is "false", combine the else statements.

if(Conditional statement) {
     //Conditional statement is true(true)Is executed here at
}
else {
     //Conditional statement is false(false)Is executed here at
}

It is necessary to judge the condition in order to branch the process such as if statement. Judgment is called "evaluation".

Relational operator

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Logical operator

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switch statement

The switch statement allows you to specify the code to execute if the specified variable takes a specific value. Variables are specified in switch, and conditional values are specified in case. You can specify the code to execute after the case value :. The code block runs until break.

switch(variable) {
case value 1:
case value 2:
     //This is executed when the value is 1 or 2.
     break;
case value 3:
     //This is done when the value is 3
     break;
default:
     //Value 1, 2,This is done when neither of 3 is
     break;               
}

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