Theifstatement may have an optionalelseblock. The syntax of theif..elsestatement is: if(test expression) {// run code if test expression is true}else{// run code if test expression is false} How if...else statement works? If the test expression is evaluated to true, statements inside ...
else if (expression) statement4 else statement5//处理一些意外情况,错误检验,可以省略不写。 3.2、Switch 类似于else-if选择语句,区别在于选择条件表达的取值不同 语法表示如下: switch (expression) //表达式必须返回整数值(包括字符型) { case const-expr1: statements; break;//每个case后面跟一个标签值,必...
C If Else statement is kind of an extension toC IfStatement. In C If statement, we have seen that execution of a block of statements depends on a condition. In If Else statement, we have one more block, called else block, which executes when the condition is false. So, in C if-else...
We can have multiple branches of conditions with additional else if statements. if_else_if.c #include #include <stdio.h> #include <stdlib.h> int main() { srand(time(NULL)); int r = rand() % 10 - 5; printf("%d\n", r); if (r > 0){ printf("The number is positive\n...
Avoid deep nesting: If you find yourself nesting If statements too deeply, consider refactoring your code by breaking down the logic into functions. Common Pitfalls and How to Avoid Them Forgetting an else statement: Sometimes, every condition should have an outcome. Missing an else can lead to...
nested-statements }while(conditional-expression); Conditional Execution And Selection /*If Statements*/ if(conditional-expression) { then-clause } /*If-Else Statements*/ if(conditional-expression) { then-clause } else{ else-clause } /*Switch Statements*/ ...
if(cond){ ... statements; ...}else{ ... statements; ...}可是有时候 cond 只在极少的情况下发生,例如:随机生成一个随机数,该随机数的范围是 0~100000,如果随机数小于 2,则将 val 赋值为 -1,否则将 val 赋值为当前UTC时间,相关C语言代码如下,请看: if(myrand() < 2) val = -1;else val ...
else if 语句是 if 语句的扩展,它允许我们在 if 语句的基础上添加更多的条件,以便更灵活地控制程序的流程。 在C 语言中,if 语句是最基本的条件语句,它用于根据一个条件来 执行特定的代码块。if 语句的语法如下: if (condition) { // code to be executed if condition is true } 在这个语法中,condition ...
// Write assignment and conditional statements here as appropriate if( NUM1 < NUM2){ largest = NUM2; smallest = NUM1; } else{ smallest = NUM2; largest = NUM1; } if ( NUM2 < NUM3 ){ largest = NUM3; smallest = NUM2;
根据6.1 Statements and Declarations in Expressions 一文可知, GNU C 对标准 C 做了扩展,允许被圆括号封装的 compound statements 具有返回值,要求是 compound statements内 最后一个语句是 expression statements 。注意,该 expression statements 同样可以是一个 compound statements。