what does if mean

The original meaning of if is "if, if". In programming languages, the if statement is used to determine whether the given conditions are met. Based on the results of the determination, the execution of the two given One of the operations, the return value of if is true or false, which can be stored in a bool variable and occupies one byte.

The if statement refers to a programming language (including c language, C#,, java, VB, assembly language, etc.) used to determine whether a given condition is Satisfy, decide to perform one of the two given operations based on the result of the judgment (true or false). The return value of if is true or false, which can be stored in a bool variable and occupies one byte.

Example:

C language provides two forms of if statements:

1, if (expression) statement.

if（x>y）printf("%d",x);

2. if (expression) statement 1 else statement 2

if（x>y)printf("%d",x);
else printf("%d",y);

In each statement, there can be multiple statements, but they need to be added Upper braces

if(x>y){printf("%d",x);puts("");}

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