ImplementsStatementSyntax ImportAliasClauseSyntax ImportsClauseSyntax ImportsStatementSyntax IncompleteMemberSyntax InferredFieldInitializerSyntax InheritsOrImplementsStatementSyntax InheritsStatementSyntax InstanceExpressionSyntax InterfaceBlockSyntax InterfaceStatementSyntax ...
If Expressions (Crystal Syntax)Article 09/14/2006 The If expression is one of the most useful control structures. It allows you to evaluate an expression if a condition is true and evaluate a different expressio
3. 如果前面所有条件都为False,程序就会执行else子句中的所有代码(如果有else子句的话); 要注意的是,在if语句中, if expression:、 elif expression:和else:后面缩进的多行代码被称为代码块,一个代码块会被当做一个整体来执行,除非遇到了return、break、continue等语句,会终止代码块后面语句的执行。 在使用Python...
Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true when its result is nonempty and contains only nonzero elements (logical or real numer...
SingleLineIfStatement(ExpressionSyntax) 代表單行「如果 ...然後。。。否則...聲明。 SingleLineIfStatement(ExpressionSyntax, SyntaxList<StatementSyntax>, SingleLineElseClauseSyntax) 代表單行「如果 ...然後。。。否則...聲明。 SingleLineIfStatement(SyntaxToken, ExpressionSyntax, Syntax...
Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true when its result is nonempty and contains only nonzero elements (logical or real numer...
If the conditional expression is satisfied (TRUE), the statement after the THEN keyword will be returned. When the conditional expression is not satisfied (FALSE), the statement after the ELSE keyword will be returned.SyntaxA typical IF-ELSE Statement Tableau looks like this:...
if [not] errorlevel number command [else expression] if [not] string1**==**string2 command [else expression] if [not] exist FileName command [else expression] If command extensions are enabled, use the following syntax: if [/i] string1 CompareOp string2 command [else expression] if cmd...
Syntax:if (boolean expression 1){// Execute this if expression1 is true}else if (boolean expression 2){//Execute this if expression2 is true}else{//Execute this if none of the above expressions are true}How Does If-Else-If Ladder Statement In C++ Work?
elif expression1:# 可以有任意多个elif语句 statements1...elif expression2:statements2...else:statements... 在上面if语句的3种形式中,第2种形式和第3种形式类似的,如果第2种形式中的elif子句不出现,则变成了第2种形式。也就是说,第3种形式其实是第2种形式的特例。