Multi Program Operating System
A single user program cannot keep the CPU busy at all the time. The OS can put many user programs in the memory and let the CPU execute instructions of one programRead More…
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Switch Statement
When multiple decisions involved in the program at that time we can use else…if ladder but some time it is difficult to read and understand. In addition to this when the numbersRead More…
Nested if statement
When one if statement contains another if statement then such type of structure is known as nested if. Nested if structure also helps in multi-way decision making where one condition depends onRead More…
Else…If ladder
When we have multiple options available or we need to take multiple decisions based on available condition, we can use another form of if statement called else…if ladder. In else…if ladder eachRead More…
If…else statement
If …else statement is an extension of simple if statement. When we have two different path to follow,then simple if statement cannot be useful because if provides a single path to follow.Read More…
Decision making statements
Normally in c programming language statement are execute in a sequenced manner. Sometime we need to execute some statement based on some specific condition. Depending on the condition either we have toRead More…
String Handling Functions
Upper(): It returns specified string into the upper case. Syntax: Upper(String or Filed); Example: SELECT upper(‘Welcome’) FROM DUAL; // with constant String SELECT upper(firstName) FROM EMP ; // where firstName is aRead More…
Operators
An operator is a special symbol that tells the compiler to perform some task. C- Language provides large number of In-build operators. An operator operates on operands. Operators can be dividing intoRead More…
Batch Operating System
Computer systems of the 1960’s used card reader and punch cards as the primary input medium. The primary output devices were line printers, tape drives and punch cards. In these type ofRead More…
What is Operating System?
An operating system is a system program that creates an interface between the user and the computer system. It provides an environment in which other programs can run smoothly and n efficientRead More…