Example 1: if statement // Program to display a number if it is negative#include<stdio.h>intmain(){intnumber;printf("Enter an integer: ");scanf("%d", &number);// true if number is less than 0if(number <0) {printf("You entered %d.\n", number); }printf("The if statement is ...
#if、#elif、#else、#endif #if可支持同时判断多个宏的存在,与常量表达式配合使用。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #if常量表达式1// ... some codes#elif 常量表达式2// ... other codes#elif 常量表达式3// ...#else// ... statement#endif 常量表达式...
The “if-else” statement in C programming holds the power to guide your code’s execution path based on conditions. By using “if-else” statements, you can build adaptable applications that cater to a range of scenarios, from grading systems to authentication processes and interactive menus. ...
if语句的形式：if (condition) statement_1 else statement_2这里的condition表示条件，其本质是...
When we need to execute a block of statements only when a given condition is true then we use if statement. In the next tutorial, we will learn C if..else, nested if..else and else..if. C - If statement Syntax of if statement: The statements inside the b
The following are examples of theifstatement: C if( i >0) y = x / i;else{ x = i; y = f( x ); } In this example, the statementy = x/i;is executed ifiis greater than 0. Ifiis less than or equal to 0,iis assigned tox, andf( x )is assigned toy. The statement forming...
if语句后面可以跟一个可选的else语句,该语句在布尔表达式为false时执行。 语法(Syntax) C编程语言中if...else语句的语法是 - if(boolean_expression) { /* statement(s) will execute if the boolean expression is true */ } else { /* statement(s) will execute if the boolean expression is false *...
If there is multiline code and you do not use curly braces, then only first statement of the body is considered as if statement body. Be sure, when you have to use curly braces or not? Consider the given example: #include<stdio.h>intmain(){inta=10;intb=-10;intc=0;if(a==10)pri...
if (expression)statementelsestatement 在两种形式的if语句中,将计算可具有结构之外的任何值的表达式(包括所有副作用)。 在第一种形式的语法中,如果expression为 true(非零),则执行statement。 如果expression为 false,则忽略statement。 在第二种形式的语法(使用了else)中,如果expression为 false,则执行第二个statement...
Internally, however, they are stored as zero and one. if() Statements The if() statement is used to check for conditions. Just like we use if in normal English, if() in code is used to test for a condition—they test for the value of a boolean (or any int—in this case, a zer...