if statement meaning

Objective Process Control statement: In the process of executing a program, the order of execution of each statement has a direct effect on the result of the program. That is to say, the process of the program has a direct impact on the running

One way to "make something happen" is to evaluate an expression with a side effect. Injected assignments and function calls these expressions with side-effects can be used as separate statements, and this expression is also called an expression

1, if statement An If statement is an important feature in most languages, and it executes the program segment according to the conditions. PHP's If statement is similar to C: if (expr) Statement As discussed in an expression, expr is computed

Conditional statement, which is a kind of statement that chooses to execute according to the condition in the program, the difficulty lies in how to abstract the condition accurately in the actual use of such statement. For example, to implement the

Can not underestimate this simple finally, seemingly simple problems behind, but hidden countless mystery. Next I will take you step-by-step to uncover this finally mysterious veil.Problem Analysisfirst of all, let me ask you a question: Finally

int index; if (index = = 0) { NSLog(@ "11111"); }Else if (index = = 1) { NSLog(@ "2222222"); }Else if (index = =3) { NSLog(@ "3333333"); }......Do we see this kind of code that looks like a little eye ache? If it is you, how will you

Any php Tutorial script consists of a series of statements. A statement can be a value assignment statement, a function call, a loop, or even a (null statement) condition statement that does nothing. The statement usually ends with a semicolon. In

If,elseIf if, else is another meaning, if the condition is determined within the parentheses, if the condition is met, the IF statement executes the command and if it does not, the IF statement is not entered.The basic format:①if (...) Conditions

column_name = NULL returns zero rows even if there are null values in column_name." data-guid="2776ca3d646dd75517976e2f1bc1511f">Official Note:column_name = NULL returns zero rows even if there are null values in column_name."

Ask the meaning of a wordpress statement $ templates & nbsp; array (); if & nbsp; (& nbsp ;! & Nbsp; $ name & nbsp;) $ templates [] & nbsp; header-{$ name }. php; $ templates [] & nbsp; header. php ask the meaning of a wordpress statement $