if statement : If statement « Statement « C Tutorial

6.3.1.if statement

To conditionally execute statements, you can use the if or the if...else statement.

The general form of the if statement is

if(expr) {

    s1 ;

    s2 ;

    ....

  }

expr is a Boolean expression that returns true (nonzero) or false (zero).

#include <stdio.h>



main(){

  int i = 3,j = 5;

  if(i < j){

     printf("i < j \n");

  }   

}

i < j

6.3.If statement
	6.3.1.	if statement
	6.3.2.	To execute only one statement, opening and closing braces are not required
	6.3.3.	The if statement: a compound statement
	6.3.4.	If with else statement
	6.3.5.	The if-else-if statement
	6.3.6.	if statement with two else statements
	6.3.7.	if statement: compare the value from user input
	6.3.8.	Using nested ifs
	6.3.9.	Use compound conditions to check for upper and lowercase letters
	6.3.10.	Checking for a Range of Values
	6.3.11.	Use isdigit Function in if statement
	6.3.12.	Operators Used in if Comparisons
	6.3.13.	if Comparisons and Their Opposites

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