If…else statement in C

January 19, 2023

 

If…else statement Definition :

In C, the If…else statement is used to carry out operations depending on a particular situation. If and only if the provided condition is true, the operation described in the if block are carried out otherwise else block is carried out.

If else In C

Syntax:

if(condition){

// statements to be executed if condition is true;

}

else{

// statements to be executed if condition is false;

}

Working of if…else statement :

  • Step 1 : In the first step, condition/expression is checked whether it is true or false.
  • Step 2 : If statement is True, if block will be executed for performing the operations.
  • Step 3 : If the condition is false , else block will be executed for performing the executions
Use of If else In C
C tutorial desk gif

if statement

Conditional statement Program

Decision Making Statements

While Loop

do while

Example 1:

Run 
#include<stdio.h>
int main() {
    int i=5;
    
    if(i>1){     // checking the condition and take decision
        printf("PrepInsta is one of the best for placement preparation");
    }
    else{
        printf("PrepInsta");
    }
    return 0;
}

Output:

PrepInsta is one of the best for placement preparation

In the above example , the value of i initialize as 5 and when the condition of if (i>1) is checked , this is taken as true and block if is executed and “PrepInsta is one of the best for placement preparation” will be print on the output screen.

Example 2:

Run 
#include<stdio.h>
int main() {
    int i=5;
    
    if(i<1){     // checking the condition and take decision
        printf("PrepInsta is one of the best for placement preparation");
    }
    else{
        printf("PrepInsta");
    }
    return 0;
}

Output:

In the above example , the value of i initialize as 5 and when the condition of if (i<1) is checked, this is taken as false and block else is executed and “PrepInsta” will be print on the output screen.

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